250 SALTS 



I have not analyzed the other species of this salt, 

 which is perhaps a tungstate not having ob- 

 tained it in sufficient quantity. 



Acetate, 14. Acetate of ammonia. Taste hot and aro- 

 matic crystals transparent four-sided oblique 

 prisms, terminated by a rhomb. Faces appa- 

 rently striated very deliquescent, so that they 

 cannot be measured. Analyzed by digesting a 

 solution of 40 grains of the crystals with 40 

 grains of pure carbonate of lime in fine powder; 

 15%5 grains of the carbonate of lime had been 

 dissolved, indicating 15*5 grains of acetic acid. 

 Hence, the constituents of the salt are 



1 atom acetic acid 6'25 

 1 atom ammonia 2-125 



7 atoms water 



16-25 



This salt was crystallized by placing a concen- 

 trated solution of it under the exhausted re- 

 ceiver of an air pump over sulphuric acid. Mr. 

 Rootsey of Bristol crystallized it in that way 

 about eight years ago. 



15. Benzoate of ammonia. This salt forms 

 beautiful crystals, having a silky lustre. I find, 

 that when kept in a carelessly stopped vessel 

 they gradually lose half of their ammonia, and 

 are converted into bibenzoate ; but 1 have not 

 ascertained the water of crystallization of this 



