One of Leonardo da Vinci’s autographed aphorisms states that Aristotle and Alexander were each other’s teachers. Interpreting it in light of those of Leonardo’s readings which instigated him to write it down along with providing him the material he needed to do so, I argue that the aphorism turns against Aristotle as an emblematically boastful, know-it-all man involved in undue occupation of all knowledge throughout history. Leonardo presents Aristotle as if he had been taught by the pernicious (...) conqueror Alexander to act in scholarship in the way the Macedonian king had acted in politics and external affairs. The core of this critique goes back to a traditional anti-Aristotelian point in Antiquity, complies with the 15th- and 16th-century anti-Aristotelianism and goes hand-in-hand with Leonardo’s own view that intelligent men (including himself) are capable of going much further than Aristotle in the direction of discovering the truth. I identify Leonardo’s sources and I argue that Francis Bacon’s repeated bitter remark that the soul of Aristotle was infected by Alexander’s tyrannic character was quite probably based on Leonardo’s aphorism. (shrink)

The interconnection of scientific studies and art represented by Leonardo Da Vinci’s portraiture accentuates his role in documenting and archiving dermatologic conditions. His anatomical dissections, sketches, and paintings, including portraits, were all a means to observe, portray, and understand the nuances of the human body. In two of his most discussed portraits, Ginevra de’ Benci and Elisabetta del Giocondo, the Mona Lisa, Leonardo’s execution of the exterior anatomy is so precise that he may have illustrated manifestations of disease (...) that allow contemporary researchers to theorize diagnoses of dermatologic as well as neurologic, endocrine and vascular conditions. These include hypochromic anemia, muscular disorders, xanthelasma, thyroid disease, lipoma, and frontal fibrosing alopecia. Leonardo’s extraordinary talent in recording his observations of shades and textures of skin and his ability to capture the nuances of subtle variations in the human body have produced a historical record that allows modern dermatology practitioners to make further observations not possible in his time. Here, dermatology and art intersect serving to document and explain the human condition, permanently archived in Leonardo’s masterpieces. (shrink)

The literature on Leonardo da Vinci is so extensive that a bibliography alone would make many volumes. Most of what has been written about him, however, are studies in history, art criticism, biography, or natural science. The number of writings on his esthetics and philosophy of culture are considerably fewer. And there are very few Marxist studies on these questions. This is particularly true of works devoted specifically to Leonardo alone.

Objective: Based upon notions to a mental vision of the Vitruvian Man, to determine if any obvious asymmetries exist within Leonardo da Vinci’s timeless schematic—which is famous for its highly symmetrical presentation. Methods: A qualitative analysis performed upon a Vitruvian Man print (taken from the namesake Wikipedia article) to: closely examine if the man’s head is positioned to noticeably tilt toward either direction—left or right—of a dissecting line superimposed for equally splitting (vertically) the circle in the schematic; and, to (...) closely examine the man’s eyes for any artistic asymmetry therein drawn. Results: The man’s head is determined tilting toward his right half/hemisphere of the circle. Also noticeable: the man’s right eye appears being of a much brighter look relative to a darkness observable about his left eye; and, an outline to an inverted equilateral triangle is identifiably shaded surrounding his left eye, whereas a more contrastingly circular shape appears as so shaded around his right eye. Discussion: Once a certain awareness is drawn to such artistic anomalies, they can become so clearly observable that one may wonder if Leonardo da Vinci did as much intentionally. And if so, then why? This paper details a hypothesis necessarily built upon the assumption that Leonardo intentionally embedded such cues within his Vitruvian Man whereby speculations toward a hemispheric brain theory can be established of such cryptic nature, given a then-pronouncedly authoritarian Catholic Church, whereupon he may have figured it possible to receive credit posthumously if ever such notions were proven valid. Incidentally, the concerning analysis as to why the Vitruvian Man’s head tilts in such a fashion aligns with Dr. Iain McGilchrist’s peer-reviewed findings to a hemispheric hypothesis. (shrink)

RESUMO: Os intérpretes dos manuscritos de Leonardo da Vinci partilham dos mesmos sentimentos de espanto e de fascínio quando examinam sua contribuição para a ciência moderna. Podemos, contudo, perceber uma constante tentativa em prol de uma revisão histórica acerca do papel desempenhado por Leonardo. Observando a história dessas revisões, é possível detectar aspectos significativos das perspectivas históricas e historiográficas dos envolvidos nessa discussão. É o que pretendemos fazer neste trabalho, focando a controvérsia entre Duhem, por um lado, e (...) Sarton, Koyré e Rossi, por outro. Ao fazer isso, buscamos discutir alguns traços que marcam a distinção entre uma historiografia mais antiga e a nova historiografia da ciência, tal como exposta por Thomas Kuhn. ABSTRACT: Interpreters of Leonardo da Vinci's manuscripts share the same feelings of astonishment and fascination when they examine his contribution to modern science. However, it is possible to perceive an ongoing attempt towards a historical revision of the role played by Leonardo. Observing the history of this ongoing revision, it is possible to detect significant aspects of the historical and historiographical perspectives of those involved in this discussion. This article deals with the controversy between Duhem's point of view, on the one hand, and the views of Sarton, Koyré, and Rossi on the other. It aims to show some features that distinguish an older historiography from the new historiography of science as presented by Thomas Kuhn. (shrink)

The Vitruvian Man of Leonardo da Vinci is one of the most famous and most studied drawings over the world as well as one of the most reproduced ones, e.g. in coins, space suit patches, books and movies. The aim of the present work is to discuss the Vitruvian Man as a figurative representation of the Leonardo’s scientific method. Our analysis is based on scientific elements both present in the drawing and provided by Leonardo in his approach (...) to this drawing. Our thesis is that the square symbolizes the measurable physical world and that the man inscribed within the square refers to the physics measurement process based on the operational definition of quantities, including the measurement unit system and the quantities conversion factors. Therefore, the measurement process is fundamental for the Leonardo’s approach to the scientific knowledge, albeit, the drawing also suggests that this latter does not correspond with the true knowledge. The circle, which has a different center with respect to the square, symbolizes the truth, to which the man inscribed in the square yearns, without ever achieving it, the truth being reachable only by the man inscribed within the circle. (shrink)

Sigmund Freud was already internationally acclaimed as the principal founder of psychoanalysis when he turned his attention to the life of Leonardo da Vinci. It remained Freud’s favourite composition. Compressing many of his insights into a few pages, the result is a fascinating picture of some of Freud’s fundamental ideas, including human sexuality, dreams, and repression. It is an equally compelling – and controversial – portrait of Leonardo and the creative forces that according to Freud lie behind some (...) of his great works, including the Mona Lisa. With a new foreword by Maria Walsh.  . (shrink)

RESUMEN Este artículo explora si hay algún fundamento sólido para atribuir a Leonardo da Vinci prioridad en la formulación del símil que lleva a concebir el ojo como una cámara obscura. Aquí, se defiende una posición pesimista. No obstante, el artículo resalta algunos aportes del pintor renacentista que pueden considerarse contribuciones a la consolidación del símil. ABSTRACT The article explores whether there is any solid basis for attributing to Leonardo da Vinci the priority in formulating the simile that (...) leads to conceiving the eye as a camera obscura. Here, a pessimistic position is defended, however, the article highlights some of Leonardo's contributions to the consolidation of the simile. (shrink)

The Mona Lisa is probably the most celebrated example of ambiguous expression in art. Soranzo and Newberry demonstrated that a similar ambiguity can be perceived also in La Bella Principessa, another portrait credited to Leonardo da Vinci by many. The paper aims to show that an ambiguous expression can be perceived in a further painting attributed to Leonardo: The Lady with Dishevelled Hair, or La Scapigliata. An experiment was conducted whereby participants rated on a 7-point Likert scale the (...) perceived level of contentment of La Scapigliata and that of a comparable painting created by Andrea di Cione, alias Il Verrocchio. The two artworks were presented in random order to two groups of participants. One group could see the artworks from Close whilst the other group from Far from a Close or Far condition. Results show that the change of distance affected the perceived level of contentment of Leonardo’s figure but not that of Verrocchio’s. Specifically, whilst both artworks received similar ratings of contentment from the close-up condition, La Scapigliata was perceived to be more content from afar. It is concluded that La Scapigliata exhibits an ambiguous expression, and that this ambiguity is similar to the one observed in the Mona Lisa and La Bella Principessa. This result can be only partially interpreted within the spatial frequency hypothesis advanced by Livingstone and shows that a phenomenological account of Leonardo’s work might be more suited to capture the full extent of the phenomenon. Specifically, it is suggested that the principles of perceptual belongingness may need to be considered to fully capture the extent of the ambiguity depicted by Leonardo. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:The Birth of the Psychoanalytic Hero:Freud's Platonic LeonardoJohn FarrellThough the intellectual force of Freudian psychoanalysis grows weaker and weaker with time, its importance for the understanding of twentieth-century intellectual culture only increases. Freud made psychology a key ingredient in the century's conception of its own uniqueness and modernity. He claimed to initiate a decisive break with the past, but he also claimed to recover the past, indeed all of (...) human behavior, on new, scientific grounds. What Freud proposed was not just a new way of thinking about psychology but a new psychology, one that would permit unprecedentedly intrepid investigation of the past and the unconscious sources of its ways of thinking. But whereas Freud hoped to give us a new psychology of knowledge, what he did was to reintroduce one of the oldest psychologies of knowledge in a moderately disguised form. I will attempt to show this and assess the implications through a close examination of Freud's treatment of Leonardo da Vinci, a man he considered one of the great forerunners of the modern intellect.Psychoanalysis is both a theory of the psyche and a scientific movement. Its dual nature makes it almost a unique element in the culture of modern science. Freud and his followers repudiated the separation between institutional affiliation and intellectual commitment that had been carried down from seventeenth-century England. The original form of the psychoanalytic movement was a throwback to that of the ancient philosophical academies.1 Almost from the beginning of psychoanalysis its founders had recourse to a canon of dogma with the primacy of the libido at its center. Adherence to this canon, and the rituals of initiation and training surrounding it, became the basis for [End Page 233] an exclusive intellectual and professional commitment that separated initiates from the professional community at large.It is well known that the founders of psychoanalysis made use of psychoanalytic theory to explain the movement's adversarial relationship with the outside world. The doctrine of resistance to the libido allowed Freudians to interpret the hidden motives of anyone who might disagree with them. The ire of critics could be cited as proof of the intensity of unconscious repression applied to sexuality, the incredulity of unbelievers as evidence of an unwillingness to endure the wounds to human narcissism exacted by the Freudian system, and even slips of the tongue could be turned against unwitting opponents. The fact that psychoanalysis was greeted with hostility in some quarters was taken to prove that the universal tendency of humankind was to resist its teachings, and the lapsing away of prominent disciples illustrated the difficulty of living with these hard truths. Heretics were pitied as weaklings unable to face up to the power of the unconscious, unable to keep themselves from disguising it with it some pale reflection of the ego. And so the embattled history of psychoanalysis became part of the empirical evidence of its validity in a way that could never have occurred with a theory generated in the normal research environment. The doctrine of resistance seemed to have been designed as much for polemical as for analytic purposes. Like the monster in Forbidden Planet, the fifties Freudian fairy tale, the more psychoanalysis was resisted, the more it grew. The self-confirming value that could be derived from the history of the movement as a cultural scandal even led Freud to exaggerate the hostility of his early reception and the intensity of his early isolation. With the doctrine of resistance, Freud had imported into science the style of the avant-garde, which feeds upon rejection, outrage, and the breach of bourgeois manners. The concept of "resistance to psychoanalysis" is still in use among psychoanalysts today.The argument from resistance, however useful it may have been as a defense mechanism of psychoanalytic rhetoric, leads to a troubling theoretical question: If the truths of psychoanalysis are naturally repugnant to humankind, so much so that we have a powerful constitutional tendency to hide them from ourselves, what could have liberated Freud and his followers to unearth these unwelcome secrets from the depths of their own psyches? If we take the "resistance to psychoanalysis" as a... (shrink)

The concept of aerial perspective has been used for the first time by Leonardo da Vinci (1452-1519). This article studies its dependence on Ptolemy’s Optica and overall on the optical tradition inaugurated by Ibn al-Haytham’s Kitāb al-Manāẓir (d. after 1040). This treatise, that was accessible through several Latin and Italian manuscripts, and was the source of many Medieval commentaries, offers a general theory of visual perception emancipated from the case of the moon illusion, in which physical and psychological factors (...) are closely combined. Atmospheric extinction (not refraction, which it is sometimes confused with) affects the conjectured size of remote objects. This phenomenon is also the core source for a pictorial rendering of depth, that is based onto a principle different from the diminution of size. (shrink)

Selon Léonard de Vinci, le peintre doit « se mettre à la place de l’esprit même de la nature », entendue comme genèse perpétuelle, force vitale et métamorphique. Dans sa démesure, un tel projet fascine autant qu’il terrifie. Pour répondre à ce défi, Léonard renouvelle profondément l’art de la peinture jusqu’à en faire, en théorie comme en pratique, un exercice sans cesse recommencé. Les notes et préceptes du Traité de peinture comme les techniques qu’il invente (ou réinvente) en témoignent – (...) chiaroscuro, sfumato, perspective aérienne, componimento inculto [esquisse informe ou sauvage], etc. À la jonction de la main et de l’esprit, l’exercice de peindre sollicite une ascèse perceptive et imaginative, à travers le jugement, le regard (« jugement de l’œil », giudizio dell’occhio), porté sur le monde et ses formes mouvantes. Ascèse, au sens fort d’un désapprentissage permettant de détisser les rets de l’habitude et les tropismes subjectifs. Cet exercice opère non seulement le crayon à la main, par le déploiement de l’esquisse et la fécondité du repentir [pentimento], mais, dans un plus grand dénuement encore, en regardant « des murs souillés de beaucoup de taches », « avec l’idée d’imaginer quelque scène » – « incitation à la rêverie éveillée » comme l’appelle André Chastel. Dès lors l’exercice de peindre (ou la peinture comme exercice) prend chez Léonard une tournure très étonnante et singulière : tout en privilégiant la dimension processuelle de l’œuvre, il s’agit de faire, pour ainsi dire, de la peinture sans pigment ni pinceau. Autrement dit, la prétention cosmique du peintre n’a d’égale que son aptitude au dénuement. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:T. S. Eliot, Dharma Bum:Buddhist Lessons in The Waste LandThomas Michael LeCarnerMany critics have argued that T. S. Eliot's The Waste Land is a poem that attempts to deal with the physical destruction and human atrocities of the First World War, or that he had somehow expressed the disillusionment of a generation. For Eliot, such a characterization was too reductive. He replied, "Nonsense, I may have expressed for them (...) their own illusion of being disillusioned, but that did not form part of my intention." He did not want to be the poet of a "lost generation" of war survivors, but rather, he wanted, like most poets, to write for all ages. To that end, Eliot sought to transcend time and space by bringing to The Waste Land scores of literary, cultural, and artistic allusions from a variety of sources including the Upanishads, Greek mythology, the Bible, Chaucer, Dante, Spenser, Shakespeare, and Leonardo Da Vinci. Ironically, within this menagerie of literary homages, Eliot has created a vast emptiness, a world of pain, suffering, desolation and despair, as if to suggest that even in the presence of all the greatest artistic and cultural achievements of mankind, we must understand that life is transitory and material things ephemeral.The idea that life is fleeting and filled with suffering is at the core of Buddhist thought and one that Eliot surely learned from his graduate studies at Harvard. Several scholars have examined the influence of Eastern philosophy, and in particular Buddhist thought, on Eliot's work, largely in the past forty years.1 My argument departs from this scholarship in two significant ways. First, I will read The Waste Land through the lens of Eliot's graduate studies, and in doing so will show how the poem functions as a didactic, artistic representation of the Buddhist doctrine of samsāra, an idea that views the world as transitory, overcome [End Page 402] with lustful desires, and forever bound to a cycle of life, death, and rebirth. From this perspective, we can see how Eliot's understanding of the original Buddhist texts, which informed much of his writing of The Waste Land, allowed him to see through the all-too-common misconceptions about Buddhism during the early part of the twentieth century. Lastly, we will see that Eliot looked at these misconceptions as a psychological projection of Europeans' discontent with their own lives in an uncertain time.Over the past three decades an increasing number of scholars have studied Eliot's graduate work. In 1985, Jeffrey Perl and Andrew Tuck published a study that examines the impact that Eliot's coursework and professors had on during his studies at Harvard.2 Perl and Tuck point out that Eliot devoted nearly one third of his graduate program to the study of Asian philosophy and philology. Eliot studied Sanskrit and Pali under C. R. Lanman, the preeminent Sanskrit specialist of the age. In his third year, Eliot took a course entitled "Schools of Religious and Philosophical Thought in Japan" with Professor Masaharu Anesaki, a course that had a profound impact on him. Eliot was exposed to several schools of Buddhism in his studies including the Kegon, Shingon, and Tendai, which are characterized as "descendants of the Madhyamika School, which was founded in the second century A.D. by Nāgārjuna, the Indian Buddhist philosopher." Nāgārjuna is widely considered the most influential Buddhist philosopher after Siddhartha Gautama himself and is the leading proponent of the Mādhyamika ("Middle Way") philosophy.The central teaching of Nāgārjuna was the doctrine of śūnyatā, or as it is often translated, "emptiness." For Mahāyāha Buddhists, all things are totally empty of any defining essence. Thus, all things are void of any fixed identity or inherent existence and remain in a constant state of impermanence, change, and flux. This is the fundamental premise of Mahāyāha Buddhism. Only through the realization of this emptiness in material things can one achieve Buddhahood. According to one standard text, "the real knowledge of Buddha nature is empty of empirical content, and it is the discovery of that emptiness or void, śūnyatā, of the true Buddha... (shrink)

Visual representation of instruments and musical practice has long been integral to the study of the iconology and archaeology of early music. Critical to any assessment of such evidence is an understanding of the authority of the artist, and his/her knowledge and degree of participation in musical culture. Contemporary sources reveal that music played a variety of roles in the lives and public perception of the Renaissance artists. Its most tangible manifestation was that of the artist-musician, of whom (...) class='Hi'>Leonardo da Vinci is one of the best-known examples. An association with courtliness was one of several markers of status conferred by musical practice. This chapter investigates the domestic setting of the artist, whether in a courtly environment or in a republic, to develop themes of the social elevation of the artist, entertainment and performance, as well as creativity. (shrink)

Extensive scientific, philosophical and artistic activities were carried out in the Islamic World’s various science and civilization centers during the early Middle Ages. In these centers, noteworthy works of mathematics, astronomy, geography, medicine, pharmacology, optics, botany, chemistry and other fields of science, which would later determine improvement paths for these fields, were created. Abu al-Izz Ismail ibn al-Razzaz al-Jazari (12th-13th centuries), was a magnificent Muslim scientist known for his work named The Book of Knowledge of Ingenious Mechanical Devices (Kitab fi (...) ma‘rifati’l-hiyal al-handasiyya) and he was born in geography where many scientists were trained. He contributed to the development of science and civilization, the joint legacy of humanity and demonstrated his true capability and success in the field of ilm al-hiyal (the scientific field which addresses the information and practices regarding mechanical technology and engineering in Islamic science history). From this perspective, it is evident that al-Jazari had a wide field of interest, made his mark in the age he lived in with his brave and innovative ideas, and was a wise engineer. al-Jazari’s detailed descriptions and explanations of water clocks, oil lamp clocks and water pumping machines, as well as their construction, were astounding. In addition, al-Jazari’s studies on metal casting techniques, cone valves, wheel balance and the real-world use of aspiration tubes are important in contemporary engineering studies. When all these are considered, it becomes clear that his designation as the “Leonardo da Vinci of the Islamic World” is not a coincidence. Many studies on al-Jazari’s scientific legacy have been conducted in various parts of the world. There are various manuscripts of his aforementioned book. Based on these manuscripts, the work has been -fully or partially- translated into many languages, including Turkish. The German and English translations served as a basis for studies on al-Jazari in other languages. In recent years, studies conducted on al-Jazari in Türkiye (books, articles, domestic and international symposiums, congresses etc.) have demonstrated his brilliance and competence as a scientist. Furthermore, studies on al-Jazari are still ongoing in Türkiye. As for Russia, the scientific legacy of the scientists raised in the Islamic World such as Avicenna, al-Farabi, Abu Bakr al-Razi, Abu Rayhan al-Biruni, Abu al-Qasim al-Zahrawi, Muhammad ibn Musa al-Khwarizmi, al-Battani, al-Kashi, Abd al-Rahman al-Khazini, Nasir al-Din al-Tusi was researched within the scope of a special plan and program. Depending on the relevant studies, al-Jazari and his work drew attention as well. A small portion of the aforementioned Russian studies is known in Türkiye. It is safe to assume that al-Jazari studies in Russia are virtually unknown in Türkiye. The present study primarily aims to contribute to the literature on the scientific legacy of al-Jazari, a Middle Age Islamic scientist best known for his famous work in the mechanical field. More specifically, the present study aims to: 1) to identify the studies on al-Jazari in Russia, and in the former USSR countries, where academic studies are still in Russian after the Soviet Union period, to create a chronological biography and to set forth their compilation; in other words, to create a bibliography which includes Russian studies on al-Jazari; 2) to provide information on the structure and content of the studies in question, to detect the methodological issues encountered in these works, and make solution recommendations to solve these issues; 3) to contribute to continuing and future studies in Türkiye on al-Jazari in terms of source and material index. In conclusion, it should be stated that comparative reading was conducted centered on The Book of Knowledge of Ingenious Mechanical Devices (Kitab fi ma‘rifati’l-hiyal al-handasiyya). It should also be noted that Russian popular internet publications (which are not based on academic research and are created/reproduced for commercial and personal purposes) were excluded from the assessment. (shrink)

The ArgumentFranz Borkenau's book,The Transition from Feudal to Modern Thought(Der Übergang vom feudalen zum bürgerlichen Weltbild[literally:The Transition from the Feudal to the Bourgeois World-Picture]), serves as background for Grossmann's study. The objective of this book was to trace the sociological origins of the mechanistic categories of modern thought as developed in the philosophy of Descartes and his successors. In the beginning of the seventeenth century, according to Borkenau, mechanistic thinking triumphed over medieval philosophy which emphasized qualitative, not quantitative considerations. This (...) transition from medieval and feudal methods of thought to modern principles is the general theme of Borkenau's book, and is traced to the social changes of this time. According to this work, the essential economic change that marked the transition from medieval to modern times was the destruction of the handicraft system and the organization of labor under one roof and under one management. The roots of the change in thought are to be sought here. With the dismemberment of the handicraft system and the division of labor into relatively unskilled, uniform, and therefore comparable activities, the conception of abstract homogeneous social labor arises. The division of the labor process into simple repeated movements permits a comparison of hours of labor. Calculation with such abstract social unities, according to Borkenau, was the source from which modern mechanistic thinking in general derived its origin.Grossmann, although he considers Borkenau's work a valuable and important contribution, does not believe that the author has achieved his purpose. First of all, he contends that the period that Borkenau describes as the period of the triumph of modern thought over medieval should not be placed at the beginning of the seventeenth century, but in the Renaissance, and that not Descartes and Hobbes but Leonardo da Vinci was the initiator of modern thought. Leonardo's theories, evolved from a study of machines, were the source of the mechanistic categories that culminated in modern thought.If Borkenau's conception as to the historical origin of these categories is incorrect in regard to time, Grossmann claims it follows that it is incorrect also in regard to the social sources to which it is ascribed. In the beginning, the factory system did not involve a division of labor into comparable homogeneous processes, but in general only united skilled handicraftsmen under one roof. The development of machinery, not the calculation with abstract hours of labor, is the immediate source of modern scientific mechanics. This goes back to the Renaissance and has relatively little to do with the original factory system that was finally superseded by the Industrial Revolution.While Borkenau, in tracing the social background of the thought of the period, relies chiefly on the conflicts and strife of political parties, Grossmann regards this as one element only in the formation of the general social situation, which in its entirety and in the interaction of its elements explains the development of modern thought. (shrink)

Leonardo da Vinci’s extensive drawings and notes devoted to anatomy do not arise in a medical context. He does not engage with surgery or “physic.” Rather, his aim is to reveal what he understood to be the divine engineering of God’s greatest creation. His earliest anatomical drawings map the conduits for the “spirits” at a deep level not practiced by other artists interested in the human body. The first set of drawings he produced in 1489 describes skulls with brilliant (...) draftsmanship. His notes for these drawings are predominantly concerned with the location of the “common sense” (sensus communis) at the geometrical center of the cranium. The next great set of drawings completed in ca. 1510 expounds the form and functions of the bones and muscles in meticulous mechanical detail, probably in collaboration with the young Paduan doctor, Marcantonio della Torre. Leonardo’s greatest realization of mathematics in anatomy comes when he looks at the valves of the heart; in studying the heart he also conceived a casting technique that he adapted to determine the form of the ventricles in the brain, radically revising the traditional arrangement of these structures. In a range of portrayals from diagrammatic to pictorial and from static to dynamic, Leonardo’s anatomical research is unrivalled in revealing the mechanics of the human body. His work in this context is an underappreciated precursor of the modern science of biomechanics. (Larger-sized versions of the Leonardo drawings presented here are available as supplementary material in the online version of this article.). (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Philosophy and Literature 25.1 (2001) 181-196 [Access article in PDF] Bookmarks What is Genius? Denis Dutton There's a school of thought which holds that there's nothing much of interest that can be said about genius. The root idea is older than Kant, but it was well summarized by him: genius is a natural endowment, deep, strange, and mysterious, at least with respect to putative explanations. Schubert can get up (...) in the morning and before lunch knock off five songs that captivate us hundreds of years later. There's no way for us to account for this, and we ought not to expect, Kant claims, that genius can explain itself either: Schubert doesn't have a clue how he does it.Yet trying to figure out how creative geniuses do it remains a permanent source of fascination, most of it fairly naïve. When the ingénue reporter is sent out by the City Editor to interview the famous, crusty old novelist, the first question is normally, "Where do you get your ideas?" Of course, if the novelist knew that, he'd not be likely to blab it in the press. Kant's point is that he cannot really know; no one can. Monroe Beardsley relays a story about Picasso, who claimed to suffer from "an indigestion of greenness" from walking in the woods on a summer's day: "I must empty this sensation into a picture," Picasso said. "Green dominates it. The painter paints as if in urgent need to discharge himself of his sensations and his visions." Beardsley observes that green indigestion could have been even more plausibly used to "explain" a red painting ("I needed an antidote to all that green"), or a pen-and-ink drawing ("I needed to get away from color"), or anything else. There is in this a general point about why we are so often disappointed by interviews with artists. The artist can do; the artist can't explain how. [End Page 181]It does not follow, however, that nothing of interest can be learned, at least at a descriptive level, about genius. Dean Keith Simonton has spent most of a career looking at the subject as a psychologist, and his Origins of Genius: Darwinian Perspectives on Creativity (Oxford University Press, $27.50) ties together much of his research and that of others in a way that extends thinking on genius far beyond armchair meditations or mere platitudes. At the heart of Simonton's project are two very different ideas: first, he argues that evolution and processes of natural selection provide illuminating models to explain the existence and operation of creative genius in the sciences and the arts. Second, he propounds a rather more dubious thesis, that the process of natural selection itself is an adequate model for understanding genius at work, that the history of human ideas demonstrates a kind of secondary evolution. To these hypotheses, Simonton adds a further Darwinian overlay: he returns repeatedly to the personality and biography of Charles Darwin himself as the paradigm of a life of creative genius. While this has the advantage of anchoring the discussion, giving it a kind of ostinato ground, it diverts Simonton from the manifestations of genius, especially artistic genius, which do not resemble Darwin's personal example.Creative genius is defined by Simonton as the capacity to originate scientific discoveries, artistic works, technical inventions, or engage in political leadership, in a manner that achieves what is conventionally termed eminence. The eminent person creates, discovers, or invents something that passes the test of time and, like the similar test devised by Hume to mark out artistic greatness, appeals to cultures beyond that of the original act of creation. It is not hard for the philosophically trained reader to devise counter-examples to Simonton's general theses, but the value of his book does not require a rigorous definition at the outset. Whatever genius is, and however we might dispute it, there is no doubting that Leonardo Da Vinci, Shakespeare, Newton, and Einstein count as creative geniuses in Simonton's sense. High raw IQ is frequently associated with genius... (shrink)

Resumo Este artigo procura apresentar e discutir tentativas recentes em filosofia social de analisar e interpretar o capitalismo, a partir de uma perspectiva praxeológica. O practice turn em teoria social procurou superar o dualismo entre agência e estrutura, ou entre ação e sistema, por meio da noção de prática social. Seria possível então interpretar o capitalismo como um tipo especifico de prática social? Para tentar encaminhar essa questão, explicita-se brevemente, em um primeiro momento, em que consiste o practice turn em (...) teoria social. Num segundo momento, analisa-se e se discute a proposta de Rahel Jaeggi de conceber a economia como uma rede de práticas sociais. Em seguida, expõe-se e se avalia a tentativa de Christian Lotz em ver, no dinheiro, a chave para compreender aquilo que ele chama de esquema capitalista. Por fim, conclui-se, chamando a atenção para os potenciais e desafios ligados ao empreendimento de interpretar o capitalismo em função de uma teoria da prática, sugerindo que um aprofundamento na análise da imaginação especificamente capitalista, vinculando-a com a típica plasticidade e diversidade do capitalismo, possa ajudar a avançar nesse campo.This paper aims to present and discuss recent attempts in social philosophy to analyze and interpret capitalism from a praxeological perspective. The practice turn in social theory sought to overcome the dualism between agency and structure, or between action and system, through the notion of social practice. Is it then possible to interpret capitalism as a specific type of social practice? To try to address this question, I briefly introduce, in a first moment, the practice turn in social theory. In a second moment, I analyze and discuss Rahel Jaeggi’s proposal to conceive the economy as a network of social practices. I then explain and evaluate Christian Lotz’s attempt to see money as the key to understanding what he names as “the capitalist schema”. Finally, I conclude by drawing attention to the potentials and challenges of interpreting capitalism as a social practice, suggesting that a deeper analysis of specifically capitalist imagination, linking it with the typical plasticity and diversity of capitalism, may help to move forward in this field. (shrink)

In this article, we intend to show how Habermas's intellectual project began to take shape since its first book. In this work sharp differences already appear in relation to the first generation of Critical Theory, especially when it comes to the diagnosis of late capitalism. Thus, we hope to recover the importance of the work and the subject to the understanding of the theoretical trajectory of the author. Moreover, at this point Habermas still maintains a posture of radical critique of (...) the capitalist order, which will be clearly reviewed in the works of maturity, particularly from the 80s. (shrink)

What does it mean to assert that a society produces negative social experiences? From the standpoint of social ontology, what is the image or figuration of society presuposed in such a diagnosis? This article aims to address such inquiries through the reconstruction of some theoretical models, particularly critical ones. Methodologically, it involves starting from how each model diagnoses negative social experiences in order to better reflect on the various possibilities of understanding the social. This article is divided into three parts. (...) In the first part, focusing on classical social theory, I discuss the treatments given by Durkheim and Marx to the phenomenon of suicide, as well as working with the concept of alienation in the latter. Next, within the realm of Frankfurt critical theory, I expose how both Adorno’s and Honneth’s models can be read as attempts to confront the problem of social suffering within modern societies. Finally, in a third moment, I analyze how negative social experiences are articulated with the idea of radical critique by Luc Boltanski. This perspective will be presented as an alternative to the Honnethian model in overcoming challenges facing the field of critical theory today. (shrink)

Leonardo Da Vinci’s Notebooks. From Neo-Platonism to Physicalism. The epistemological thinking of Leonardo Da Vinci does not continue the tradition of Neo-Platonic thought, but surpasses it in order to abandon it. Generally, it comes to a rupture with the authorities of Antiquity and the Middle Ages. But, on close reading of the Notebooks of Da Vinci, some structural and morphological parallels with the Neo-Platonic principles and ideas become apparent, which the Renaissance man converted to laws of nature. The (...) presence of these correspondences indicates the existence of a transition phase, when the new way of thinking progressively replaces the previous one. The physicalistic view of reality is gaining ground as the metaphysics was replaced by the study of the sensible world as an autonomous reality.Ο επιστημονικός τρόπος σκέψης του Λεονάρντο Ντα Βίντσι δεν συνεχίζει τη Νεοπλατωνική παράδοση σκέψης αλλά την υπερβαίνει για να την εγκαταλείψει. Γενικά, έρχεται σε ρήξη προς τις αυθεντίες της Αρχαιότητας και του Μεσαίωνα. Ωστόσο, κατά την ανάγνωση των Σημειωματάριων του είναι εμφανείς δομικές και μορφολογικές αντιστοιχίες με ορισμένες Νεοπλατωνικές αρχές και ιδέες, οι οποίες έχουν πλέον μεταμορφωθεί σε φυσικούς νόμους. Η παρουσία αυτών των αντιστοιχιών υποδηλώνει την ύπαρξη ενός σταδίου μετάβασης, όταν ο νέος τρόπος σκέψης υποκαθιστά ολοένα και περισσότερο τον προηγούμενο. Η φυσιοκρατική αντίληψη για την πραγματικότητα κερδίζει έδαφος, καθώς η μεταφυσική υποκαθίσταται από την αντιμετώπιση του αισθητού κόσμου ως αυτόνομη πραγματικότητα. (shrink)

This article explains the philosophy of Leonardo da Vinci, who through his writings, designs and pictorial work, shows a tension and rupture on the art, beauty and truth of his time. Painting is scientific and therefore a liberal art, but it does not manifest the sacred truth of the icon of the medieval finalist worldview, but it will be the scientific truth of Modernity.

Este artículo explora si hay algún fundamento sólido para atribuir a Leonardo da Vinci prioridad en la formulación del símil que lleva a concebir el ojo como una cámara obscura. Aquí, se defiende una posición pesimista. No obstante, el artículo resalta algunos aportes del pintor renacentista que pueden considerarse contribuciones a la consolidación del símil.

This article studies a fragment on the conic sections that appear in the Codex Atlanticus, fols. 611rb/915ra. Arguments are put forward to assemble these two folios. Their comparison with the Latin texts available before 1500 shows that they derive from the De speculis comburentibus of Alhacen and the De speculis comburentibus of Regiomontanus, joined together in his autograph manuscript. Having identified the sources, and discussed their mathematics, the issue of their transmission is targeted. It is shown that these notes (...) were written by Paolo dal Pozzo Toscanelli, through whom they reached the notebooks of Leonardo da Vinci. (shrink)

No one before Platter and Kepler proposed retinal reception of an inverted visual image. The dominant tradition in visual theory, especially that of Alhazen and his Western followers, subordinated the intra-ocular geometry of visual rays to the requirement for an upright image and to preconceptions about the precise nature of the visual spirit and its part in vision. Henry of Langenstein and an anonymous glossator in the late Middle Ages proposed alternatives to Alhazen, including the suggestion of double inversion of (...) the image. Leonardo da Vinci was aware of both Alhazen's theory and Henry's contradiction, but perhaps not of the anonymous hypothesis of double inversion. Leonardo's visual ‘theory’ has more the character of a critique than of a theoretical alternative, and he did not transcend the medieval concept of visual spirit. (shrink)