180 



122. AMMONIUM SULPHATE (NH 4 ) 2 S 4 . (Oxysulphide of Ammo- 



nium, Normal Sulphate of Ammonium, Glauber's Secret Sal 

 Ammoniac.') 



a. Crystallized, impure. 



b. Ditto, ditto. 



c. Ditto, purified. 



Note. Specimen a was obtained from the ammoniacal liquor formed 

 during the destructive distillation of bones ; specimen b, from the am- 

 moniacal liquor obtained in the process of purifying coal gas. 



123. SULPHOCARBOLATE. N H 4 C 6 H 5 S 4 . (Sulphophenate of Am- 



monium. ) 



a. Crystallized. 



124. SULPHOCYANIDE. NH 4 CyS. (Sulphocyanate of Ammonium.) 



a. In yellow crystals: 



Note. This specimen is impure, the colour being probably due to the 

 presence of mellone, which is formed by decomposition of the salt. 



125. VALERIANATE. N" H 4 C 5 H 9 2 . (Valerate of Ammonium.) 



a. A deliquescent crystalline mass. 



LITHIUM. L. 



126. METAL. 



f a. Preserved in Persian naphtha. 



127. CARBONATE. L 2 C 3 . 



a. Amorphous, in powder. . 



128. CITRATE. L 3 C 6 H 5 7 . 



a. In crystalline masses. 



CAESIUM. Cs. 



129. CHLORIDE. Cs Cl. 



t a. Crystallized. 



RUBIDIUM. Rb. 



130. CHLORIDE. RbCl. 



f a. Crystallized. 



SILVER, OR ARGENTUM. Ag. 



131. METALLIC. 



f a. Beaten into very thin sheets. (Silver Leaf.) 

 t b. Pure, in small pieces. 



132. CHROMATE. Ag 2 Cv 4 Cr 3 . (Acid Chromate of Silver.) 



t a. Dark-brown crystalline powder. 



133. NITRATE. AgN0 3 . 



t a. Crystals. 



