BIOGRAPHICAL INDEX 563 



TENNANT, SMITHSON, b. 1761, Wensleydale ; d. 1815, Boulogne. 

 Professor of Chemistry at the University of Cambridge 



- Carbon from fixed air by action of phosphorus on 



chalk, 99 



1797. Diamonds burned with saltpetre, 99 

 TENNANT, CHARLES 



1799. Bleaching-powder, 228 



THOMSON, THOMAS, b. 1773, Crieff; d. 1852, Kilmun, Argyle- 

 shire. Doctor of Medicine, and Regius Professor of Chemistry 

 at Glasgow 



1 8 30- 1831. History of Chemistry, 305 



1808. Multiple proportions in oxalates of potassium and 



strontium, 305 



1813. Atomic weights as multiples of oxygen, 482 

 1825. Attempt to Establish the First Principles of Chemistry 

 by Experiment, 483 



VALENTINE, BASIL. Said to have been a monk living in the 

 fifteenth century, but this is very doubtful as his 

 works did not appear until the beginning of the 

 seventeenth century 

 1624. Triumphal Chariot of Antimony (tr. 1661) 



- Last Will and Testament (tr. 1656). Preparation of 



oil of vitriol, 13, 163; of "vitriols" from metals, 

 17; of sugar of lead and acetate of copper, 20; 

 caustic alkali, 54 

 VELEY, V. H. 



1889, 1898. Properties of pure nitric acid, 533 

 1893. Properties of dry gases, 533 



VOLTA, ALESSANDRO, b. 1745, d. 1827, Como. Professor 

 of Physics at Como and at Pavia 



1776. Letters on the Inflammable Air of Marshes. Discovery 



of marsh-gas, 156 ; explosion of marsh-gas with air, 

 156 

 1790. Volta's eudiometer, 122 



1800. Voltaic pile, 271 



V/ANKLYN, J. A. 



1869. Sodium fused in dry chlorine, 533 

 WEBER, HEINRICH FRIEDRICH 



1875. Atomic heat of boron, 366 

 WENZEL, KARL FRIEDRICH (1740-1793) 



1777. Lehre von der Verwandtschaft der Korper (Theory of 



Affinity}. Fails to discover law of reciprocal 

 proportions, 311 



002 



