L" 492 ] 





AN 



INDEX 



TO THE 



SEVENTY-FIFTH VOLUME 



OF THE 



PHILOSOPHICAL TRANSACTIONS. 



A. 



yfCT'jNiA. See BarlaJoes. 



^ Air, Experiments on, by Henry Cavendifh, Bfq. p. 372. The diminution of the 

 ail by the ekiStric fpark depends upon the converfion of phlogiftlcated air into nitrous 

 acid, ibid. Defcription of the apparatus made ufe of (tab. XV.). ibid. Fig. 1,2, 

 and 3. explained, p. 373. Method of forcing the ele(flric fpark through the tube, 

 p. 374. Experiments, when the cle61ric fpark was paffed through common air, 

 included between fliort columns of a folution of litmus, ibid. When lime-water was 

 ufed inftead of the folution of litmus, ibid. With impure dephlogillicated air, p. 

 375. Obfervations on the refults of thofe experiments, ibid. When air was confined 

 by foap-lees, 375 — 377. Experiments to determine what degree of purity the air fhould 

 be of, in order to be dimlnifhed the moll; readily, and to the gveateft degree, p. 376, 

 Precipitation of a folution of filver by phlogifticaied nitre, p. 377. General reafoning 

 upon all the experiments, p. 378 — 380. Method of preparing the foap-lees, and 

 dephlogifticated air, ufed in tbefe experiments, p. 380. Quantities of each ufed therein, 

 p. 381. Experiment to determine whether all the phlogiftlcated air of the atmofphere 

 is of the fame nature, p. 381 — 3S2. See Phlogijikated Air. Another caufe of the 



T t t 2 dimi- 



