Born in 1838, Mach was a pioneer in the field of physics, having even made an impression on Einstein in his younger life who credited him with being the "Philosophical forerunner of relativity theory." His name is also associated with the speed of sound (as in traveling at Mach "insert-number-here") as well as the Doppler effect. Throughout his career, he was particularly interested in the biological and sensory relationship to physics and science, and naturally, this interest expanded to that of (...) the world of psychological perception and physiological psychology as well as philosophy. The Analysis of Sensations is about just that, the nature of the relationship of physics and the physical sciences to psychological phenomena of sense and perception. It's a fascinating read for anyone looking to expand their knowledge of how the two sides of the same coin meld harmoniously. (shrink)

Pierre Duhem (1861-1916) gehörte zu jenen Wissenschaftlern, die im ausgehenden 19. Jahrhundert an der Umbildung der Physik im großen Stil arbeiteten und damit an der Vorbereitung der wissenschaftlichen Revolution beteiligt waren, die durch Planck und Einstein herbeigeführt wurde. Duhems klassisches Werk der modernen Wissenschaftstheorie hat auf die Entwicklung des logischen Empirismus nachhaltigen Einfluß ausgeübt. Das von Duhem beigezogene reichhaltige Material und seine konzisen Fallstudien stellen eine Fundgrube für jeden dar, der sich ernsthaft mit Wissenschaftstheorie beschäftigt.

xi should hope for "first and foremost" from any historical investigation, including his own, was that "it may not be too tedious. " II That hope is generally realized in Mach's historical writings, most of which are as lively and interesting now as they were when they appeared. Mach did not follow any existing model of historical or philosophical or scientific exposition, but went at things his own way combining the various approaches as needed to reach the goals he set (...) for himself. When he is at his best we get a sense of the Mach whom William James met on a visit to Prague, the Mach whose four hours of "unforgettable conversation" gave the forty year old, well traveled James the strongest "impression of pure intellectual genius" he had yet received, and whose "absolute simplicity of manner and winningness of smile" captivated him completely. 12 Consider, for example, the first few chapters of this book, Principles of the Theory of Heat, which Mach devotes to the notion of temperature, that most fundamental of all thermal concepts. He begins by trying to trace the path that leads from our sensations of hot and cold to a numerical temperature scale. (shrink)

It is undisputed that all scientific knowledge proceeds from sense perception. And the way in which sense perception is fostered by the graphic arts generally, and in particular by photography, likewise needs no further explanation here.

Many debates have already taken place on the reliability of the results obtained by means of sphygmographs. The following remarks may contribute to clarify some still unsettled points.