ANNOTATED LIST OF PERSONS 347 



Sainte-Claire-Deville, Henri Etienne (1818-1881). French chemist. 

 Brother of the geologist. Both were Students at College Rollin. 

 Professor in the Normal School and in the Sorbonne. Member of 

 the Academy of Sciences. Discovered high temperature disasso- 

 ciation. Studied the silicates. Improved methods of working 

 platinum, aluminium, sodium and magnesium. Discovered nitric 

 anhydride (1849). Obtained in masses, melted and pure, the re- 

 . fractory metals, manganese, chromium, nickel and cobalt; with 

 Caron succeeded in producing, artificially, rubies, sapphires, and ori- 

 ental emeralds. Induced the Metric Commission to use an alloy 

 of platinum-iridium for its standards and during the last ten years 

 of his life was engaged with his illustrious friend Stas of Belgium in 

 preparing sets of these measures, which were not permitted to vary 

 more than one thousandth of a millimeter. Friend of Pasteur. 

 Collaborated with Wohler, Caron, and Debray. For portraits 

 see "Le Centenaire de 1'Ecole normale" (1895), p. 407, and Pop. 

 Sci. Monthly, Feb., 1882. 



For a splendid appreciation of Sainte-Claire-Deville by De'sire' 

 Gernez see "Le Centenaire de 1'Ecole normale." Paris, 1895, 

 pp. 407-425. 



"II est impossible de decider lequel des deux fut le plus grand 

 en lui, de 1'homme de science ou de 1'homme de bien." 



"Puisse son example developper, chez les jeunes gens qui s'en- 

 gagent dans la carriere scientifique, le deVouement a la Science, 

 1'une des formes les plus e'leve'es, les moins bruyantes et les plus 

 pures de 1'amour de la Patrie!" (Gernez.) 



Sanson, ( ). French pathologist. 



Schroder, H. ( ). German chemist. Collaborated with Th. 



von Dusch on fermentation and also published independently. 

 Wrote many papers on "Volumconstitution fester Korper." 



Schwann, Theodore (1810-1882). German physician and naturalist. 

 Professor in Lou vain and Li6ge. Discovered pepsin in gastric 

 juice. Following Robert Brown's discovery of the nucleus in plant 

 cells (1831) and Schleiden's studies, he discovered the nucleus in 

 animal cells, and showed (1839) that animals and plants are 

 composed of the same (cellular) elements ("Mikroskopische Unter- 

 suchungen iiber die Uebereinstimmung in der Structur und dem 

 Wachsthum der Thiere und Pflanzen," Berlin, 1839). Schwann's 

 observations referred to in the text were published in 1837 in Pogg. 

 Ann. der Physik und Chemie, Bd. XLI, p. 184 ("Vorlaufige 

 Mittheilung, betreffend Versuche iiber die Weingahrung und 

 Faulniss"). 



Schulze, Franz ( : ). German chemist in Berlin. His lucid paper 



"Vorlaufige Mittheilung der Resultate einer experimentellen 



