179 



113. AMMONIDM BENZOATB. NH 4 C 7 H 5 2 . 



a. Crystallized. 



114. BROMIDE. NH 4 Br. 



a. Crystallized, pure. 



115. CARBONATE. N 4 H 18 C 3 O 8 . (Sesquicarbonate of Ammonium, 



Smelling Salts, Volatile Suit, Salt of Hartshorn.) 



a. In crystalline lumps, impure. 



b. Ditto, purified. 



c. Impure solution, prepared from the destructive distilla- 



tion of bones. 



d. Ditto, from coal gas. 



Note. This salt is never very definite in composition, but always con- 

 tains varying proportions of carbonic acid and ammonia. 



116. BICARBONATE. NH 4 HCO 3 . 



a. In crystalline masses. 



b. In powder. 



117. CHLORIDE. NH 4 C1. (Hydrochlorate of Ammonia, Sal Am- 



moniac, Muriate of Ammonia.) 

 a. In crystalline masses. 

 6. In crystalline powder. 



Note. Specimen b was obtained by evaporating a solution with con- 

 stant stirring. 



18. MOLTBDATE. (NH 4 ) 2 Mo0 4 . (Neutral Molybdate of Am- 



monium.) 



a. In crystalline powder. 



Note. This specimen was examined by Mr. N. T. Carringtou, and was 

 found to be the neutral salt, the salt usually found in commerce being 

 the acid salt, N H 4 H Mo 4 . See P. J. [3] , vol. v., pp. 362, 376. The 

 specimen in the Museum is the one alluded to by Mr. Davies on p. 375. 



19. NITRATE. NH 4 N0 3 . (Nitrum Flammans, Nitrum Semi- 



volatile.) 



a. Crystals. 



b. Ditto, a very fine specimen, presented by Messrs. 



Hopkin & Williams. 



Note. Specimen a is opaque, from having been dried at a temperature 

 of 300 F. See Per. Mat. Med., vol. i., p. 471. 



20. OXALATE. (N H 4 ) 2 C 2 4 , 2(H 2 0). 



a. In acicular crystals. 



121. PHOSPHATE (N H 4 ) 2 H P 4 . (Diammonic Phosphate, Neutral 

 Phosphate of Ammonium.) 

 a. In tabular crystals. 

 Note. This specimen has an alkaline reaction. 



