In this paper I explore the character and role of stereoformulas and models of the atom that appeared in the early history of stereochemistry, including those of Jacobus Henricus van't Hoff, Aemilius Wunderlich, Johannes Wislicenus, Victor Meyer, Arthur Hantzsch, Alfred Werner, and Hermann Sachse. I argue that stereochemists constructed and used stereoformulas in a pragmatic way that ignored the physical implications of the spatial distribution of valence, and that the models of the atom were created to reconcile the physically curious (...) concept of valence with known physical laws. Although such models were explanatory at a deeper level, they had little impact on the theory and practice of chemistry, and were not serious attempts to reduce chemical theory to physical laws. (shrink)

SummaryThe development of universities and technical schools in nineteenth century Switzerland is commonly assumed to be similar to the development of comparable schools in Germany. To a large extent this is correct, but there are subtle differences in the founding and organization of Swiss institutions that are reflective of the Swiss national and local cantonal contexts. In the case of Zürich, the specific local political and financial conditions underlying the formation of the University of Zürich, the Zürich Cantonal School and (...) the Swiss Federal Polytechnic resulted in a complex set of dual appointments and shared facilities that were absent at comparable chemical laboratories at German universities. This essay outlines the origins of these complex relationships under Carl Löwig and Georg Städeler and follows in more detail the complex career path of Johannes Wislicenus in Zürich from his appointment as Privatdozent in 1860 to his appointment as Director of the Polytechnic in 1871. Wislicenus’ career path illustrates the institutional context of chemistry in Zürich and shows how this context, including the roles of cantonal and federal support, and the physical constraints created by shared laboratory facilities, shaped chemical research and instruction in Zürich. (shrink)

Insights into the history of chemistry Content Type Journal Article DOI 10.1007/s11016-010-9482-4 Authors Peter J. Ramberg, Truman State University, 100 E. Normal, Kirksville, MO 63501, USA Journal Metascience Online ISSN 1467-9981 Print ISSN 0815-0796.

J. H. van 't Hoff's 1874 Dutch pamphlet, in which he proposed the spatial arrangement of atoms in a molecule, is one of the most significant documents in the history of chemistry. This essay presents a new narrative of Van 't Hoff's early life and places the appearance of the pamphlet within the context of the 'second golden age' of Dutch science. We argue that the combination of the reformed educational system in The Netherlands, the emergence of graphical molecular modelling (...) within the theoretical and practical culture of chemistry during the 1860s and 1870s, as well as Van 't Hoff's own personal research trajectory, formed the background to his unprecedented attribution of spatial meaning to the traditional concept of atomic 'arrangement'. We also present a new English translation of the pamphlet, for we have found that the existing translation, published by G. M. Richardson in 1901, contains many errors, changes and omissions. The new version offers a more accurate rendition in English of Van 't Hoff's style and argument. (shrink)