198 



IRON SULPHATE. 



b. Ditto, pure. (Ferri Sulphas, B.P.) 



c. Granulated, by precipitation with alcohol. 



d. Exsiccated. (Ferri Sulphas Exsiccata, B.P., 1867.) 



330. PERSULPHATE. Fe 2 (SO 4 ) 8 . 



a. Pale-yellow powder. 



331. SULPHOCARBOLATE. Fe (C 6 H 5 S 4 ) 2 . 



a. Green crystals. 



332. POTASSIO-TARTRATE. (Ferrum Tarfaratum, B.P.) 



a. Pseudo-crystalline scales. 



NICKEL. Ni. 



333. METALLIC. 



f a. Small cubes, as met w'ith in commerce. 

 t b. Pure. 



334. CHLORIDE. Ni C1 2 . 



f a. Anhydrous, in yellow powder, 

 t b. Ditto, in greenish-yellow crystalline powder, 

 f c. Acicular crystals. 

 Note. The greenish tint of specimen b is due to the presence of cobalt. 



335. OXIDE. Ni O. 



f a. Hydrated, impure, of a dirty green colour. 

 t b. Ditto, pure, of ati apple-green colour. 



336. PHOSPHATE. Ni 3 2PO 4 . 



t a. Powder. 



337. SULPHATE. Ni S O 4 , 7 H 2 0. 



t a. Small green prismatic crystals. 



COBALT. Co. 



338. METALLIC. 



t a. Small cubes, as met with in commerce. 

 t 6. Pure. 



339. CARBONATE. 2 Co C 3 , 3 Co H 2 2 , H 2 0. 



f a. Pinkish powder. 

 Note. This substance is a mixture of the carbonate and hydrate 



340. CHLORIDE. Co C1 2 . (Dichloride of Cobalt, Cobaltouf Chloride.) 



f a. Crystallized, impui'e. 

 f b. Ditto, pure. 

 Note. Specimen a contains nickel. 



341. AMMONIO-CHLORIDE. Co C1 2 , 6 N H 3 , H 2 0. (Chloride of Rowv- 



Cobaltia, Claudet's salt.) 

 t a. Crystallized. 



