134 HEINRICH ROSE ON THE COMBINATIONS OF 



X. Bicarbonate of Ammonia, with greatest quantity of Water. 

 By the distillation of the -I- carbonate of ammonia, with 5 

 atoms of water, which was prepared by distilling the \ car- 

 bonate, with 4 atoms of water, I obtained a sublimate, which, 

 on examination, proved to be a bicarbonate, with a still larger 

 portion of water. 1'351 grm. of it gave 1-408 gnn. of metaUie 

 platina; 0-681 grm., with muriatic acid, 174-3 cub. centim., and 

 0-512 ; in a second experiment 131*55 cub. centim. carbonic 

 acid. This corresponds to the following composition : 



Ammonia 18*12 



Carbonic acid . . . 50-67-50-86 

 Water 31-21 



100-00 

 which would be represented by 2 C + NH^ + 3 H, or rather 

 2 C + NH' + 2 H ; and the salt, calculated according to this, 

 wovild be composed of 



Ammonia 19-41 



Carbonic acid 50*05 



Water 30-54 



100-00 

 As this salt was procured only in small quantity, its preparation 

 should, by right, have been repeated in larger quantities. I 

 have, however, thought it better to mention these experiments in I 

 this place, to show that the bicarbonate, like all the other com- 

 binations of carbonic acid and ammonia, is capable of combi- 

 ning v\ ith very diffei'ent quantities of water. 



XI. Seven-four Carbonate of Ammonia. 

 This salt was obtained by distilling the bicarbonate with a 

 greater quantity of water, 4C + 2NH'*4-3H, during which 

 process a disengagement of carbonic acid gas took place, and, in 

 fact, phsenomena similar to those which occurred with the sub- 

 limation of the sesquicarbonate. 0-923 grm. of the sublimed 

 salt gave 1-030 grm. metalUc platina; 0-602 grm. produced 

 148-7 cub. centim., and 0-545 grm., 131-32 grm. of carbonic acid 

 gas, giving the following composition : 



Ammonia 19'41 



Carbonic acid 47-70 — 48-90 



Water 32-89 



100-00 



