Der Denkstil der Chemiker. Der Aufsatz diskutiert die Tragfähigkeit des Begriffes “Denkstil”, wie er von Alistair Crombie eingeführt und Ian Hacking aufgegriffen wurde, für das Verständnis dessen, wie das Fach Chemie historisch seine Identität ausgeprägt hat. Obwohl weder Crombie noch Hacking den Begriff “Denkstil” in Bezug auf einzelne Disziplinen verwendet haben, erscheint im Fall der Chemie seine Anwendung besonders vielversprechend, weil er hier hilft, ein zentrales Problem zu thematisieren – nämlich die Frage, wie es Chemikern trotz wechselnder Gegenstandsbereiche und theoretischer (...) Umbrüche gelang, eine eigenständige und stabile Identität auszubilden. Nach einer Einführung in den Begriff “Denkstil”, argumentiert der Aufsatz, dass die Beständigkeit der Chemie als eines Faches wesentlich in ihren Laborpraktiken gründet, die ihrerseits wiederum die spezifische Art der Fragen bestimmten, die Chemiker in ihren Forschungen stellten bzw. die Form der Antworten, nach denen sie suchten. Folgende Merkmale kennzeichnen diesen “chemischen Denkstil” (1) eine spezifische, im Herstellen begründete Form des Wissens, (2) die Befassung mit einzelnen Stoffen und Materialien statt mit Materie im Allgemeinen und (3) eine Beobachtung von Natur besonders im Hinblick auf Transformationsprozesse.The Chemists' Style of Thinking. This paper discusses the relevance of the notion of “styles of scientific thinking” introduced by Alistair Crombie and revisited by Ian Hacking, for understanding how chemistry shaped its identity. Although neither Crombie nor Hacking applied this notion to individual disciplines, it seems appropriate to use it in the case of chemistry because it helps to address a puzzling issue: how did chemists manage to shape an identity of their own, despite shifting territories and theoretical transformations? Following a presentation of the notion of style, I will argue that the stable identity of chemistry is rooted in laboratory practices, which determined the specific questions that chemists put to nature as well as the answers to their questions. The “chemical style of thinking” is characterized by i) a specific way of knowing through making, ii) the concern with individual materials rather than matter in general and iii) a specific commitment to nature. (shrink)

The law of definite proportion and the law of multiple proportions are two of the important laws of chemistry associated with the development of the atomic theory in the early nineteenth century. A detailed study of these laws shows that they have characters which cannot be reconciled with philosophers’ accounts of laws of nature. They are non-universal, and one of them is imprecise. Philosophers have approached an account of laws of nature by trying to fit their character to a particular (...) model. Duhem, in particular, who introduces the law of multiple proportions as an example, misrepresents the law to make it fit his conventionalist model. The various models adopted by philosophers have differed widely, but there has been a universal failure even to recognize the possibility of diversity among laws, let alone face its reality. A more liberal and pluralistic view of just what is a law of nature is required. Contrary to standard accounts, laws of nature are a diverse group of dicta, of widely varying character. Unlike philosophers, chemists have recognized this diversity for at least a hundred years. In many ways the differences between the characters of laws are more interesting than the similarities. The analysis will show that some laws are approximations, while others are exact; and that some laws are purely formal, but not all of them. But on a more revolutionary note, it will also show that many quite respectable laws of science are non-universal, and even that there are a few that cannot be formulated as precise propositions. There is a possible escape for the philosophical accounts, in the claim that laws of character inconvenient for a particular model are not really laws. This course will be considered, and found inadvisable. The more appropriate course of action would rather seem to be a recognition of the scientists’ broader notions of scientific law, and acceptance of a wide diversity of character among laws of nature. (shrink)

SummaryThe outbreak of war in 1914 found Britain unprepared for a lengthy conflict. British science and industry were particularly ill-prepared to meet the demands of static warfare. Within two years, however, mobilization had made appreciable strides, and, as Britain's munitions industries moved from crisis to confidence, Britain's chemical industry was transformed by an arsenal of ‘garrison chemists’, with skills either born of necessity or borrowed from overseas. At the same time, Britain's chemical leadership traced a path that led them (...) from voluntarist to corporate methods, from private to public initiatives, and from individual to collective behaviours. This paper suggests four key stages in this mobilization, and hints at the significance of the war for the emergence of new sub-disciplines, for the careers of chemists, for academic-government relations in research, and for the image, status, and international position of British chemistry on the threshold of the postwar world. (shrink)

Summary This paper investigates the extent of overseas migration by British chemists over the period 1887–1971. Notwithstanding the ‘brain drain’ alarms of the 1960s, overseas employment was characteristic of some 19% of British chemists’ careers throughout our period, though its nature changed considerably. Our study examines the overseas employment histories of four cohorts of members of the [Royal] Institute of Chemistry in the ‘Chemists’ Database’ at the Open University. Those employed abroad were not only highly qualified but (...) also both geographically mobile and occupationally versatile. Over the period, the pattern of chemists’ migration was broadly similar to that of British migration trends more generally. Except in the interwar years, chemists’ rate of migration was relatively constant. However, the length of time they spent abroad declined markedly over the period: long-term migration became less characteristic than short-term overseas employment for purposes of career development. From the late nineteenth century, British chemists staffed the Empire, but also found employment in the expanding US economy. After 1945, chemists’ destinations shifted more markedly towards North America, including Canada, and later also to Europe. Our work thus provides a new perspective on the dynamics of scientists’ migration and contributes to studies on the brain drain. (shrink)

The most immediate reason why chemists are unenthusiastic about the philosophy of science is the historic hostility of important philosophers, to the concept of atoms. (Without atoms, discovery in chemistry would have proceeded with glacial slowness, if at all, in the last 200 years.) Other important reasons include the anti-realist influence of the philosophical dogmas of logical positivism, instrumentalism, of strict empiricism. Though (as has been said) these doctrines have recently gone out of fashion, they are still very influential.A (...) diagram of the methodology of experimental research is proposed, in the form of a flow sheet, with feedback. The model is developed as a multi-level expansion of a diagram of the hypothetico-deductive model. It recognizes that strong mutual support, or interlocking, of research endeavors is important, at the underlying level or levels where explanatory causation contributes to scientific understanding. (Mutual support at the laboratory level is generally weak or trivial.) The multiplicity of explanatory levels, and the interlocking, point to solutions to some well-known problems, such as the origin of the hypotheses, and even a resolution to the underdetermination problem. (shrink)

Summary Contrary to previous views of an acute shortage of chemists at the beginning of the twentieth century, this study found that the number of chemists identifiable by name in the Manchester area was substantial, even in 1902. Moreover, the majority were qualified to some extent. The total number of chemists and their degree of formal qualification increased rapidly during the period 1902-36. Employment data demonstrate that they worked not only in the chemical industry, but in a (...) wide range of manufacturing industry and commerce. Only a relatively small proportion was employed in education. Research chemists were active in the area in the late nineteenth century: by 1936, 28% of Manchester chemists recorded their job title as research chemist or research manager. If Manchester were typical of Britain as a whole the number of chemists employed in 1902 would greatly exceed previous estimates. More speculatively, the number of chemists in Britain in 1902 may even have been comparable to that in Germany. (shrink)

Chemistry and biochemistry in Germany was notably affected by the dismissal and emigration of Jewish scientists. The expulsion of Jewish scientists aided to significantly reduce the international regard for German science, particularly in biochemistry, physical chemistry, and quantum chemistry, after 1945. In most cases remaining scientists adjusted quickly after 1933 to the new political circumstances, with a few exceptions. A number of them even actively supported the politics of National Socialism. This fact as well as the common stance to forget (...) the 12 years of National Socialist rule complicated the exchange of international scientific knowledge after 1945 and delayed affiliation of the weakened fields of research to the level of international research. (shrink)

The most immediate reason why chemists are unenthusiastic about the philosophy of science is the historic hostility of important philosophers, to the concept of atoms. (Without atoms, discovery in chemistry would have proceeded with glacial slowness, if at all, in the last 200 years.) Other important reasons include the anti-realist influence of the philosophical dogmas of logical positivism, instrumentalism, of strict empiricism. Though (as has been said) these doctrines have recently gone out of fashion, they are still very influential.A (...) diagram of the methodology of experimental research is proposed, in the form of a flow sheet, with feedback. The model is developed as a multi-level expansion of a diagram of the hypothetico-deductive model. It recognizes that strong mutual support, or interlocking, of research endeavors is important, at the underlying level or levels where explanatory causation contributes to scientific understanding. (Mutual support at the laboratory level is generally weak or trivial.) The multiplicity of explanatory levels, and the interlocking, point to solutions to some well-known problems, such as the origin of the hypotheses, and even a resolution to the underdetermination problem. (shrink)

The concept of molecular structure is fundamental to the practice and understanding of chemistry, but the meaning of this term has evolved and is still evolving. The Born–Oppenheimer separation of electronic and nuclear motions lies at the heart of most modern quantum chemical models of molecular structure. While this separation introduces a great computational and practical simplification, it is neither essential to the conceptual formulation of molecular structure nor universally valid. Going beyond the Born–Oppenheimer approximation introduces new paradigms, bringing fresh (...) insight into the chemistry of fluxional molecules, proteins, superconductors and macroscopic dielectrics, thus opening up new avenues for exploration. But it requires that our ideas of molecular structure need to evolve beyond simple ball-and-stick-type models. (shrink)

The most immediate reason why chemists are unenthusiastic about the philosophy of science is the historic hostility of important philosophers, to the concept of atoms. (Without atoms, discovery in chemistry would have proceeded with glacial slowness, if at all, in the last 200 years.) Other important reasons include the anti-realist influence of the philosophical dogmas of logical positivism, instrumentalism, of strict empiricism. Though (as has been said) these doctrines have recently gone out of fashion, they are still very influential.A (...) diagram of the methodology of experimental research is proposed, in the form of a flow sheet, with feedback. The model is developed as a multi-level expansion of a diagram of the hypothetico-deductive model. It recognizes that strong mutual support, or interlocking, of research endeavors is important, at the underlying level of levels where explanatory causation contributes to scientific understanding. (Mutual support at the laboratory level is generally weak or trivial.) The multiplicity of explanatory levels, and the interlocking, point to solutions to some well-known problems, such as the origin of the hypotheses, and even a resolution to the underdetermination problem. (shrink)

In contrast to anti-Jewish campaigns at German universities in the 19th century, which met with opposition from liberal scholars, among them prominent chemists, there was no public reaction to the dismissals in 1933. Germany had been an international leader in chemistry until the 1930s. Due to a high proportion of Jewish physicists, chemistry was strongly affected by the expulsion of scientists. Organic and inorganic chemistry were least affected, while biochemistry suffered most. Polymer chemistry and quantum chemistry, of minor importance (...) among the majority of academic chemists was further weakened by the expulsion of renowned scientists. However, a look at the research carried out in Nazi Germany shows that no field of research "emigrated" as such, except research into molecular beams. The reception of emigré chemists differed with respect to their field of research and the degree of competition in the host countries. Thus biochemists and physical chemists were accepted at American universities, whereas organic chemists were not. In contrast, they received high positions in Turkey, Palestine/Israel, and Egypt. After WWII, few emigrés were asked to come back. The delay of the resumption of international contacts by German chemists contributed to the delay in rebuilding in particular German biochemistry, the physical chemistry of polymers, and physical organic chemistry. (shrink)

I respond to Scerri’s recent reply to my claim that there was a scientific revolution in chemistry in the early twentieth Century. I grant, as Scerri insists, that there are significant continuities through the change about which we are arguing. That is so in all scientific revolutions. But I argue that the changes were such that they constitute a Kuhnian revolution, not in the classic sense of The Structure of Scientific Revolutions, but in the sense of Kuhn’s mature theory, developed (...) in the 1980s and early 1990s. (shrink)

Summary Raphael Meldola FRS (1849–1915) was professor of chemistry at the City and Guilds Technical College in Finsbury. He was a colleague and close friend of Silvanus Phillips Thompson FRS (1851–1916), the college principal and professor of physics. This paper follows an earlier one on Thompson and the making of his career. It is intended to illustrate further the ways in which scientists of Meldola and Thompson's generation gained advancement within the scientific community. Meldola had interests beyond chemistry, including a (...) serious interest in field entomology. In this he had several well-known mentors including Alfred Russel Wallace and Charles Darwin. The paper, which includes much new information derived from archival work, is presented as six thematic narratives related, among other things, to chemical and technical education, dye chemistry, the Royal Society solar eclipse expedition of 1875, natural history and Darwinism, field clubs, learned societies, and the honouring of scientists. Together these narratives illustrate a generalist/voluntarist career pattern that came to an end with the First World War. (shrink)

Nowadays it is well known among historians of science that Francis Bacon, one of the modern defender of the experimental method, owed much of his thoughts to the chemical or alchemical tradition (cf. e.g., Gregory 1938, West 1961, Linden 1974, and Rees 1977). In fact, alchemy, particularly in the Arabic tradition, was always based on laboratory investigations by carefully examining the results of controlled manipulation of materials.1..

Christian Wilhelm Blomstrand, Professor of Chemistry and Mineralogy at Lund University from 1862 to 1895, was one of the important chemists of the second half of the nineteenth century. His theoretical ideas and experimental accomplishments contributed to advances in several branches of chemistry. Living in Sweden during a transitional period between the older and newer chemistry and being a scientific as well as a political conservative, Blomstrand sought to reconcile Berzelius's dualistic theory with the unitary and type theories. He (...) was opposed to Kekulé's dogma of constant valency, and he strove to establish a sound and complete theory of variable valency. This article briefly outlines Blomstrand's life and considers his best known book, Die Chemie der Jetztzeit , as well as his work on mineralogy, inorganic chemistry , and his theoretical views on valency, diazo compounds, and metal-ammines. His so-called ‘chain theory’, as developed and modified by his fellow Scandinavian chemist and close friend, Sophus Mads Jørgensen, was for more than three decades the most popular and successful of the numerous attempts to explain the constitution, properties, and reactions of coordination compounds. (shrink)

Summary Samuel Parkes, an early nineteenth century chemist, combined in his remarkable career the role of chemical manufacturer, author, and man of affairs. His Chemical Catechism, which appeared between 1806 and 1825 in twelve successive editions, attracted large numbers of students to the pursuit of chemical sciences by its lively and attractive-yet-rigorous presentation. His important Chemical Essays contributed significantly to the progress of chemical technology. Both works exerted wide influence by their publication in several editions in America and, in translation, (...) in France, Germany, and Italy. Parkes was the principal chemical witness before Parliamentary Committees of Inquiry, and was one of the chief movers in the long and eventually successful campaign aimed at abolishing the oppressive Salt Duties which had exerted a very harmful effect on the national economy. In company with eminent chemists of the day, he gave evidence in important civil trials. Parkes' enthusiastic championship of chemistry at all levels, and his colourful personality, made him an outstanding figure on the contemporary scientific scene. (shrink)

Meyerson is known as a philosopher who displayed an impressive erudition both in history of science and philosophy, some one who spent his lifetime in reading and writing. His readers can testify (and sometimes complain) that his philosophical claims were based on and tested against a wide range of historical episodes taken from a variety of sciences. Moreover it is clear that he had an intellectualist approach to science, as he was more concerned with theories than with scientific practices. Therefore (...) it does not really matter that he was trained as a laboratory chemist and that he had practised industrial chemistry in his early career. These aspects are biographical details hardly mentioned as mere anecdotes. I would like to question the standard view that chemistry did not really matter or did act as an anti-model in Meyerson‘s philosophy. I will argue that not only chemistry provided a kind of entrance hall in the history and philosophy of science, as Meyerson himself often acknowledged, but it also shaped his philosophy. (shrink)

In this paper I investigate two views of theoretical explanation in quantum chemistry, advocated by John Clarke Slater and Charles Coulson. Slater argued for quantum‐mechanical rigor, and the primacy of fundamental principles in models of chemical bonding. Coulson emphasized systematic explanatory power within chemistry, and continuity with existing chemical explanations. I relate these views to the epistemic contexts of their disciplines.

This article examines the origins and development of J. J. Thomson's chemical thought, and the reception of his theories by chemists. Thomson's interest in chemical combination and atomic theories of matter dates from his formative schooldays at Owens College, Manchester. These themes constituted a persistent leitmotif in the development of Thomson's style of thought, and provided a powerful stimulus which enabled him to enunciate the concept of electrons as fundamental particles. Thomson's influence on chemists during the years 1903 (...) to 1923 reflects the richness and fertility of his chemical thought. He influenced the absorption of the Victorian physical tradition by American chemists, thus adding a mechanistic, picture-embedded style to theoretical chemistry. Thomson's style of thought resonated with the needs of American chemists, but was ignored in Germany. (shrink)

This paper provides a sketch of my general way of understanding professions and then applies that sketch to a specific question, how to distinguish between two very similar professions, chemistry and engineering. I argue that the professional ethics of chemists do differ from the professional ethics of engineers and that the differences are important. The argument requires definition of both 'ethics' and 'profession' - as well delving into the details of chemistry and engineering.

Mineral waters were a delicate and unstable product whose value as a remedy increased in early modern France. If it was once the prised luxury of the nobility travelling to the spa, the eighteenth century slowly watched it turned into a commodity. The waters became widely available in bottles and were sold in bureaus of distribution. Despite the logistical challenges of selecting and carrying the waters to their new urban public, many different springs made their way into most of France’s (...) cities. This took place under the watch and regulation of a uniquely dedicated institution, the Société de Médecine. This Société eventually settled its authority over the management of mineral waters, thanks to the backing of state power, the influence of the Academy and the newly recognized authority of chemists as analysts of waters. The purpose of this paper is to bring to light this overlooked institution and its essential role in the administration of mineral waters. Though it never eradicated fraud or succeeded in creating a full scientific and economic monopoly, it greatly broadened the budding trade of bottled water in France and gave a powerful incentive for chemists to better their mastering of the particularly challenging analysis of water. (shrink)

Nowadays it is well known among historians of science that Francis Bacon, one of the modern defender of the experimental method, owed much of his thoughts to the chemical or alchemical tradition (cf. e.g., Gregory 1938, West 1961, Linden 1974, and Rees 1977). In fact, alchemy, particularly in the Arabic tradition, was always based on laboratory investigations by carefully examining the results of controlled manipulation of materials.1 It is also well known that Francis Bacon’s appeal to the experimental method was (...) severe criticism of scholasticism in philosophy of nature and, in particular, of authority as the basis of knowledge.2 If we compare philosophy of nature in the early 17th century with phi-. (shrink)