546 BIOGRAPHICAL INDEX 



1802. The atmosphere composed of atoms, 317, but these do 

 not occupy equal volumes, 336 



1808. New System of Chemical Philosophy. Part I. The 

 atomic theory 292 ; atomic symbols, 294 ; assumes 

 the law of fixed proportions, 297 ; law of multiple 

 proportions, 304 ; against the theory of variable pro- 

 portions, 305 ; hydrogen as a standard of combining 

 weights, 312; formula for water, 314; rejects the 

 law of equal volumes (Avogadro's hypothesis), 336 



1 8 10. New System of 'Chemical Philosophy. Part 1 1. Rejects 

 Gay-Lussac's Law of Volumes, 337. Carbonic an- 

 hydride decomposed by sparking, 144 ; composition of 

 olefiant gas, 155 ; olefiant gas decomposed by spark- 

 ing., 156 ; properties of marsh gas, 156 ; composition 

 of marsh gas, 157 ; marsh gas decomposed by spark- 

 ing, 1 57 ; composition of coal gas, 1 58 ; composi- 

 tion of sulphurous anhydride, 168 ; combination of 

 sulphurous anhydride with oxygen, 169 ; prepara- 

 tion and composition of sulphuretted hydrogen, 172, 

 175 ; preparation of phosphorus, 177 ; phosphor- 

 etted hydrogen, 180 ; combination of nitric oxide and 

 oxygen, 201 

 DANIELL, JOHN FREDERIC, (1790-1845), Professor of Chemistry 



at King's College, London, and inventor of the Daniell cell 



1840. Salts as compounds of two radicals, 270 



DAVY, Sir HUMPHRY, b., 1778, Truro ; d., 1829, Geneva. 



Professor of Chemistry at the Royal Institution ; President of 



the Royal Society. 



1800. Researches, Chemical ajid Philosophical chiefly concern- 

 ing nitrous oxide, or dephlogisticated nitrotis air, and 

 its respiration. Preparation and properties of nitrous 

 oxide, 79 ; nitrous oxide as an anaesthetic, 80 ; com- 

 position of nitrous oxide, 193; composition of nitric 

 oxide, 194 ; its density, 337 ; combination of nitric 

 oxide with oxygen, 201, composition of nitrogen 

 peroxide, 195 



1807. Bakerian Lecture, " On the Decomposition of the Fixed 



Alkalies." Davy decomposes potash, 273 ; soda, 278 ; 

 properties of potassium, 275; sodium, 278; (1810), 

 composition of the alkalis, 283 ; suspects oxygen in 

 ammonia, 264 (1812), and hydrogen in sulphur and 

 phosphorus, 265 



1808. Bakerian Lecture, "On the Decomposition of the 



Earths. . . and on the Amalgam procured from Am- 

 monia." Composition of the earths, 280 ; properties 



