Accurate comparisons of temperatures, as read with the aid of thermometers filled with different gases, have not often been made. The history of the subject may be said to have begun with the classical researches of Regnault. Of recent work of this kind, that of Chappuis was performed entirely at temperatures below 100°, the gases employed being hydrogen, nitrogen, and carbon dioxide. The experiments of Grunmach and Pernet were also conducted at temperatures below 100°. Crafts has compared the readings of a number of mercury thermometers with those obtained by Regnault and by himself with a hydrogen thermometer.
Ueber die Diffusion einiger Gase dutch auf h~here Temperatur erhitztes Platin hat W. W. R a n d a l l 1) Yersuche angestellt, auf die ich jedoch hier nur aufmerksam machen kann. (i Ueber ,,die kritische Temperatur als Kriterium der chemischen Reinheit" berichtet ]~. A 1 t s c h u 1 2). Nach den in dem Institut yon
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.