In his book, Physical Relativity, Harvey Brown challenges the orthodox view that special relativity is preferable to those parts of Lorentz's classical ether theory it replaced because it revealed various phenomena that were given a dynamical explanation in Lorentz's theory to be purely kinematical. I want to defend this orthodoxy. The phenomena most commonly discussed in this context in the philosophical literature are length contraction and time dilation. I consider three other phenomena of this kind that played a role in (...) the early reception of special relativity in the physics literature: the Fresnel drag effect in the Fizeau experiment, the velocity dependence of electron mass in beta-ray deflection experiments by Kaufmann and others, and the delicately balanced torques on a moving charged capacitor in the Trouton-Noble experiment. I offer historical sketches of how Lorentz's dynamical explanations of these phenomena came to be replaced by their now standard kinematical explanations. I then take up the philosophical challenge posed by the work of Harvey Brown and Oliver Pooley and clarify how those kinematical explanations work. (shrink)

Throughout the late 1840s and the early 1850s, Harvard botanist Asa Gray and his close friend George Engelmann of St. Louis engaged themselves with recruiting men who sought to make a living by natural history collecting, sending these men into the field, searching for institutions and individuals who would subscribe to incoming collections, compiling catalogs, and collecting subscription fees. Although several botanists have noted Gray and Engelmann’s bold experiment as having introduced America to a mode by which European naturalists had (...) devised to organize scientific expeditions, historians of science have not taken the “subscription mode” seriously. I argue that it was specifically by undertaking the labor of cataloging species and charging subscription fees for the cataloged species that Gray established himself as a metropolitan botanist. One crucial consequence of Gray’s rising profile was that he acquired sufficient “cataloging power” to secure his status as an authoritative cataloger of species, and as a kind of “mint” or “storehouse” :1–28, 2001a) who produced well-pruned lists of American species to enable transactions between American and European botanists. But this essay is not focused on the Europeanization of American taxonomy. Drawing on work by scholars who place emphasis on how new forms of knowledge get produced when knowledge travels, my focus here is the evolution of the subscription mode when Gray and Engelmann adapted it to American natural history. My conclusion examines what historian of science Vanessa Heggie :318–334, 2014) identifies as the “danger of category dominance” in today’s historiography of science and shows how a kind of “assemblage thinking” may help historians cope with this danger. (shrink)

Alexander Moritzi is one of the most obscure figures in the early history of evolutionary thought. Best known for authoring a flora of Switzerland, Moritzi also published Réflexions sur l’espèce en histoire naturelle, a remarkable book about evolution with an overtly materialist viewpoint. In this work, Moritzi argues that the generally accepted line between species and varieties is artificial, that varieties can over time give rise to new species, and that deep time and turnover of species in the fossil record (...) clearly support an evolutionary interpretation of biological diversity. Moritzi was also a gradualist and viewed relationships between taxa as best represented by a ramifying tree. Although Réflexions was the first full book to be written on the topic of evolution following Lamarck’s Philosophie zoologique, Moritzi’s evolutionist contribution was stillborn, read by almost no one in his lifetime and ultimately absent from the many historiographies of evolutionary thought. This is unfortunate since many of the arguments Moritzi marshaled on behalf of an evolutionary explanation of life can be found in subsequent transmutationist writings by Frédéric Gérard, Robert Chambers, Henri Lecoq, Baden Powell, Charles Naudin, Herbert Spencer, Alfred Russel Wallace, and Charles Darwin—none of whom is likely to have ever known of the existence of Réflexions. Finally, Moritzi’s arguments, along with those found in Darwin’s private essay on evolution of the same year, provide an excellent window into the state of evolutionary thought and debate over the nature of species at the beginning of the 1840s. (shrink)