CHLORINE. 41 



method, a known weight of silver being dissolved in nitric 

 acid and added to a known and nearly equivalent amount 

 of potassic chloride in solution, after which the excess was 

 titrated with decimal standard solution. 100 parts of silver 

 were precipitated by from 69.049 to 69.067, in mean by 

 69.062 chloride. 100 parts of chloride were precipitated by 

 from 192.33 to 192.37, in mean by 192.348 silver. Five 

 experiments were made on the composition of argentic 

 chloride by dissolving silver in nitric acid, with precautions 

 against loss by spirting, precipitation witli chlorhydric acid, 

 washing, drying, melting and weighing in the same vessel. 

 100 parts of silver gave from 132.825 to 132.844 chloride, 

 mean 132.84. Calculation from these data gives in vacuo 

 Ag = 1349.01 ; K = 488.94 ; CI = 443.20 ; for O = 100 [or 

 Ag = 107.921 ; K = 39.115 ; CI = 35.456, for = 16.] 

 {Berzelius' Jahresbericht, 24., 1844, 58 ; Bibl. Univ., 4.6, 1843, 

 350.) 



C. Gerhardt : 36 (O =16). 



By heating potassic chlorate in a current of oxygen Ger- 

 hardt got, when he took precautions against loss by spirt- 

 ing, a mean of 60.949 chloride, from which he deduces 36 

 for chlorine without giving further data. [Paris Comptes 

 Rendus, ^1, 1845, 1280.) Marignac shows that no data have 

 ever been published which, in connection with Gerhardt's 

 experiments, would give this value for chlorine. He adds 

 further experiments of his own which, without aiming to 

 establish more exactly the true atomic weight, prove it less 

 than 36 [Liebifs Annul, 59, 1846, 284; Bibl. Univ., Arch, 

 des Sciences, 1, 1846.) 



E. J. Maumene: 35.^62 (0 = 16). 



Maumene made seven analyses of argentic chloride by 

 reduction in a current of pure hydrogen. Five of these ex- 

 periments were made with quantities less than 10 grammes, 

 and gave a mean of 100 silver = 32.736 CI. Two experi- 

 ments were made with about 30 grammes each, and gave 100 

 silver equal to 32.86 and 32.853 chlorine. Maumene pre- 

 fers the latter, and deduces from them for chlorine the value 

 443.67 or 35.494 taking silver according to his own experi- 

 ments at 1350.32. [If silver is taken at 107.93 (Stas) the 

 same analyses give 35.462.] [Annal. de Chimieeide Physique. 

 (3,) IS, 1846, 41.) 



