Dr. {] re on Chloride of Lime. 11 



200 grains of the atomic proto-hydrate of pure lime were put 

 into a glass globe, which was kept cool by immersion in a body 

 of water at 50°. A stream of chlorine, after being washed in 

 water of the same temperature in another glass globe, connected 

 to the former by a long narrow glass tube, was passed over the 

 calcareous hydrate. The globe with the lime was detached 

 from the rest of the apparatus from time to time, that the 

 process might be suspended as soon as the augmentation of 

 weight ceased. This happened when the 200 grains of hydrate, 

 containing 151.9 of lime, had absorbed 130 grains of chlorine. 

 By one analytical experiment it was found, that dilute muriatic 

 acid expelled from 50 grains of the chloride, 20 grains of 

 chlorine, or 40 per cent. ; and by another, from 40 grains, 

 16.25 of gas, which is 40.6 per cent. From the residuum of 

 the first, 39.7 grains of carbonate of lime were obtained by 

 carbonate of ammonia ; from that of the second, 36.6 of ignited 

 muriate of lime. The whole results are therefore as follows : 



SynthesU. 1s t Analysi s. ,d Analysi s. MeM. 



Chlorine 39^39 . 40.00 . 40.62 . 4U.31 



Lime 46.00 . 44.74 46.07 . 45.40 



Water 14.60 . 15.26 . 13£1 • 14-28 



lOOOO 100.00 100.00 100.00 



Though the heat generated by the action of the dilute acid 

 has carried off in the analytical experiments a small portion of 

 moisture with the chlorine, yet their accordance with the syn- 

 thetic experiment is sufficiently good to confirm the general 

 results. The above powder appears to have been a pure chlo- 

 ride, without any mixture of muriate. But it exhibits no atomic 

 constitution in its proportions. 



To 200 grains of that hydrate of lime 30 grains of water 

 being added, the powder was subjected to a stream of chlorine 

 in the above way, till saturation took place. Its increase of 

 weight was 150 grains. It ought to be remarked, that in this 

 and the preceding experiment there was no appreciable pneu- 

 matic pressure employed, to aid the condensation of the chlo- 

 rine. In the last case, we sec that the addition of 30 grains of 



