THE TWELVE. IX 



MARCHAND, RICHARD FELIX. Born August 25, 1813, at 

 Berlin ; died August 2, 1849, at Halle, GERMANY. Professor 

 of Chemistry, University of Halle. 



1844, SULPHUR, 96-97. Also: Mg, 108. Wo, 273. With 



Erdmann: C, Ca, Cu, Se. Mention, 167, 211, etc. 



SVANBERG, LARS FREDERIK. Born May 5, 1805; died 



July 16, 1878, at Upsala, SWEDEN. Professor of Chemistry, 



University of Upsala. 



1844, IRON, 91-95, 242. Also: Hg, 98. Mention, 112, 



138, 211, etc. 



SCHEERER, KARL JOHANN AUGUST THEODOR. Born 



August 28, 1813; died July 19, 1875, at Dresden, GERMANY. 



1850, MAGNESIUM, 50, 108-109, 114, 260. Mention, 



138, 211. 



CROOKES, SIR WILLIAM. Born June 17, 1832, at London, 

 ENGLAND. Founder of the Chemical News. Researches 

 on Radiation in High Vacua. Discovered Thallium, 1861. 

 1873, THALLIUM, 120-138, 271, 281-4. Also: 89, 139- 



140, 169, 181, 209, 214, 218, 281, 294. 



SEUBERT, KARL FRIEDRICH OTTO. Born April 6, 1851, 

 at Karlsruhe, Baden. Professor of Chemistry at Tubingen, 

 now at Hanover, GERMANY. 



1881, PLATINUM, 115-119, 264. Also: Ir, 258. Mo, 260. 

 Os, 262. Rh, 264. Mention, 50, 75, 138, 211. 



RAMSAY, WILLIAM. Born October 2, 1852, at Glasgow, 

 Scotland. Professor of Chemistry, University of London, 

 and University College, London, ENGLAND. Nullovalent 

 Gases in the Atmosphere. 



1893, BORON, 141-151, 238. Also: 33, 42, 43, 53, 63, 

 123, 211, 217. 



ASTON, Miss EMILY, B. Sc. (Univ. of London). Associ- 

 ated with Professor Ramsay in his great work on Boron, 

 1893. ENGLAND. 



1893, SODIUM, 147-148, 261. 



RAYLEIGH, LORD. Born November 12, 1842, at Lang- 

 ford Grove, Essex, ENGLAND. Successor to Maxwell at 

 Cambridge, 1879. Professor of Natural Philosophy at the 

 ROYAL INSTITUTION OF GREAT BRITAIN, an Institution with- 

 out a peer in the world (maintained by a Society, and entirely 

 independent of the Government). Discoverer of Argon. 



1895, NITROGEN, 159-165, 201, 260. HYDROGEN, 244. 

 Also: Ur, 272-273. 



