1813.] Chlorine, and its Compounds. 133 



By the evolution pf hydrogen from water hy potassium, the 

 proportion is fixed at 16.* At p. 34 of the Phil. Trans, for 

 1810, is a reference to the Bakerian lecture for 1807, as war- 

 ranting an estimate of 15*254. On one occasion t calculations 

 are made from a proportion of 14*895, and on another % 15*6 is 

 assumed. MM. Gay-Lussac and Thenard give 16-629 as the 

 result of their experiments; § and M. Berzelius states at first || 

 17007, but afterwards** either 16*978 or 17*158. It may 

 perhaps be objected to the accuracy of my calculations, that l 

 have founded them on a proportion authorized by the mean 

 result of only two experiments, and those the first that had been 

 performed on the subject. To this I would reply, that the detail 

 given of these experiments appeared to me sufficiently minute 

 and satisfactory ; and that the other results have all of them been 

 obtained by calculations founded on a view of the constitution of 

 water, with which I must confess myself not perfectly satisfied. 



The statement of the composition of water given by Dr. 

 Thomson, ft on the authority of Fourcroy, Vauquelin, and 

 Sequin, has been adopted in the preceding calculations : this 

 proportion is 85*662 of oxygen to 14*338 of hydrogen. Gay- 

 Lussac and Humboldt give 87"4 and 12*6 ;H and in the 

 Recherches Physico-Chimiques, the calculation of the consti- 

 tuents of turpentine §§ is made from the proportion of 

 87-998152 and 12*001847, while in the analysis of oxalic acid|J|| 

 the proportions assumed are 88*367260 and 11*632739. The 

 proportions assigned by Berzelius are 88*246 and 11*754,*** or 

 87*587 to 12*4 13. -Mi- 

 Mr. Murray J J J gives 16 of oxygen and 84 of muriatic acid 

 as the constituents of oxymuriatic gas : Dr. Thomson§§§ details 

 an experiment by Chenevix, apparently very accurate, the results 

 of which were 22*5 of oxygen, and 77*5 of muriatic acid ; and 

 to this estimate I have adhered in the foregoing paper. Mr. 

 JJalton Ulljj states 24 of oxygen, and 76 of muriatic acid; and 

 Berzelius**** assigns 23*37 and 76*63, but afterwards tttt 

 states 22*768 and 77*232. 



• Phil. Trans. 1808, p. 30. + Phil. Trans. 1809, p. 55. 



$ Phil. Trans. 1810, p. 245. *j Itecherches Phys. Chim. i. p. 123. 



|| Ann. de Chim. Ixxvii. p. 84. »• Ann. de Chiui. Ixxix. p. 140. 



+ + System, fitc. i. p. 123. J J Ann. de Chim. liii. p. 848. 



tj*) Ann. de Chim. ii. p. 313. || || Ann. de Chim. ii. p. 302. 



•»* Ann. de Chim. Ixxvii. p. 84 ; Ixxxi. p. 24. 



f ♦• + Ann. deChini. Ixxix. p. 246. f J + System of" Chemistry, ii. p. 657 



■.' '. Syst. of Chcm. ii. p. 257. || || || New System, &c. 308. 



• *•« Ann. dc Chim. Ijsxvii. p. 84. tttt Ann. tie Chim. lxxx. p. 31. 



