THE TWELVE MASTERS 

 WHOSE EXPERIMENTAL DETERMINATIONS CONSTITUTE 



THE FOUNDATION OF OUR 



ABSOLUTE ATOMIC WEIGHTS 



IN PARTS SECOND AND THIRD. 



It is the experimental work of these Masters we make use 

 of their personal opinion (generally opposite of our own), 

 or even their calculated final values of atomic weights 

 (generally obtained by erroneous methods) are of no special 

 interest in this study. The order is that of the principal 

 publication. 



BERZELIUS, JONS JACOB. Born August 27, 1779, at West- 

 erlosa, Oestergotland ; died August 7, 1848, at Stockholm, 

 SWEDEN. " The Greatest Chemist of the World," see pp. 

 84-85. Portrait, see Frontispiece, representing him in 

 early life. 



1810-1830, LEAD, 74-91, 263. Also: Al, 226. As, 231. 

 Ba, 235. Bo, 238. C, 101. Fe, 91-94. Fl, 242. 

 Pd, 263. Pt, 116. Sn, 267. Te, 269-270. Rule, 3. 

 Balance, 41-43. Methods, 49. Gnat and Camel, 83. 

 Mention throughout this book. 



TURNER, EDWARD. Born in Jamaica, 1798; died Feb- 

 ruary 13, 1837, in London, ENGLAND. The first Professor 

 of Chemistry, University College. 



1833, CHLORINE, 97-99, 240. Also: Pb, 87, 89. 



Ba, 235-236. 



DUMAS, JEAN-BAPTISTE. Born July 15, 1800, at Alais; 

 died April n, 1884, at Cannes, FRANCE. For years the 

 leading Chemist of France, occupying the highest scientific 

 and Government positions at Paris. 



1840, CARBON - DIAMOND, 39, 101-105, 238, 262. 



Graphite, 48, ^03. Alsoj Al, 226. Ba, 236-237. 

 ~1, 243. Mo, 260. P, 263. 

 Pb, 89. S, 264. " Sb, 266. Si, 267. Sn, 267-268. 



Ca, 106-107. Cd, 240. Fl, 243. Mo, 260 

 Pb, 89. S, 264. Sb, 

 Sr, 268. Wo, 274-275. 



Balance, 40. Titrations, 55. Skill, iio-m. 

 Mention, 138, 157, 211, etc. 



ERDMANN, OTTO LINNE. Born April n, 1804, at Dres- 

 den ; died October 9, 1869, at Leipzig, GERMANY. Professor 

 of Chemistry, University of Leipzig. 



1844, MERCURY, 49, 61-63, 95-97, 257. Also: C, 102- 

 104. Ca, 50, 106-107. Cu, 242. Fe, 93-94. Se, 267. 

 Mention, 112, 138, 167, etc. 



