J. W. Mallet on the Atomic Weight of Lithium. 355 
ble, upon the lid of which the filter was burned, the ashes we 
moistened with nitric and then with hydrochloric acid. The li 
was placed upon the crucible, the latter was heated until the 
chlorid of silver began to fuse, and was then cooled over oil of 
vitriol, and weighed. 
_ Two experiments made by the above method gave the follow- 
ing results :— ae 
1.) 71885 grm. of LiCl gave 243086 grm. of Ag Cl. 
(2.) 85947 id of LiCl gave 29°0621 grm. of AgCl. 
ow 
24-8086 : 7°1885 :: 1792-94 (equiv. of AgCl): x 
x =530°21 (equiv. of LiCl). i ; 
53021 —443-28 (equiv. of Cl)=86-98 = equiv. of Li and 
29°0621 : 8:5947 3: 1792-94: x 
een th 
ius and Hagen is however considerable; and as it seemed possi- 
ble that a little chlorid of sodium still retained in spite of the 
purification by ether-aleohol might be the cause of this differ- 
ence, I resolved to precipitate a solution of this supposed pure 
chlorid of lithium with carbonate of ammonia, to redissolve the 
carefully washed carbonate of lithia in hydrochloric acid, and, 
8gain evaporating to dryness and fusing, to redetermine the 
chlorine by a slightly different method—namely, that of analy- 
sis by measure, as applied by Pelouze to the examination of the 
atomic weights of sodium and barium. : 
3°9942 germ. of the chlorid of lithium thus prepared from the 
carbonate were dissolved in water. 10-1278 grm. of — 
pure silver (the quantity necessary for the precipitation of the 
sil- 
ving the fluid clear. A solu- 
tion of 1 grm. of pure silver in nitric acid had been prepered, 
