BIOGRAPHICAL INDEX 559 



Vol. III. (1777). Experiments and Observations Relating to 

 Various Branches of Natural Philosophy, with a Continuation 

 of the Observations on Air (1777) ; ditto, Vol. II. (1781), with an 

 index to both the Volumes, and a " Summary View of all the 

 most remarkable facts in this and the four preceding volumes " ; 

 Vol. III. (1786). In the text, following the method adopted in 

 Priestley's Summary, the six volumes are quoted by consecutive 

 numbers I. to VI. The experiments on the "Discovery of 

 Oxygen" are quoted from A.C.R. VII. 



Experiments on Air, Vol. I. (17/4) 



1772. Apparatus for manipulating gases, 86 



1772. "Observations on Air in which Candles have Burned." 

 Sulphur burned in air over mercury, 168 



1772. "Of Nitrous Air." 72. Nitrous air mixed with common 

 a i r > 73 > goodness of air, 74 ; diminished nitrous air 

 (nitrous oxide), 77 



1772. "Of Air Infected with the Fumes of Burning Char- 

 coal." Fixed air produced by burning charcoal in 

 air over water, 95 



1772. "Of Acid Air" (i.e. hydrogen chloride), 82 



I 773~4- "Observations on Alkaline Air" (i.e. ammonia), 82. 

 Alkaline air inflammable, 258 ; sal-ammoniac from 

 acid air and alkaline air, 83 ; sal-volatile from fixed 

 air and alkaline air, 84 

 Experiments on Air, Vol. II. (1775) 



1774. " Of Vitriolic Acid Air." Preparation from vitriol and 

 olive-oil or mercury, 164 



1774. "Of Dephlogisticated Air, and of the Constitution of 

 the Atmosphere." Water and air as simple elemen- 

 tary substances, 112; discovery of oxygen, 39; 

 nitrous air reduced by iron, 187 ; action of electric 

 sparks, acid air decomposed, 224 ; alkaline air 

 decomposed, 258 

 Experiments on Air, Vol. III. (1777) 



1776. Eudiometers, 75, 90; production and nature of gases, 

 70 ; expansion of gases by heat. 327 ; nitrous air 

 dissolved by green vitriol, 72 ; properties of "nitrous 

 acid vapour" (nitrogen peroxide), 76, 525 ; properties 

 of "vitriolic acid air," 106 

 Experiments, Vol. IV. (1779) 



"Of the Volatile Vitriolic Acid and Vitriolic Acid Air." 

 Oxidation to oil of vitriol, 167 ; liberation of sulphur, 

 1 68 



"Of the Effect of the Electric Spark on Common Air." 

 Air diminished by sparking, 187, 189 



