201 



359. ANTIMONY POTASSIO-TARTRATE. 2KSb,C 4 H 4 7 . (Tartar Emetic.) 



a. Crystallized, in colourless efflorescent crystals. 



Note. For fig. of the crystals, see Per. Mat. Med., vol. i., p. 748, 

 fig. 132 ; Phillips, Transl. Pharm., 1851, p. 260. 



ARSENIC. As. 



360. METALLIC. 



a. Commercial specimen. 



5. Pare. 



361. IODIDE. As I s . 



a. Small, deep-red, shining, crystalline scales. 



362. ARSENOUS OXIDE. As 2 3 . (White Artenic, Artctxnis Acid.) 



a. Stratified lumps. 



Note. This specimen has much the appearance of pieces of white 

 potsherd. 



6. White flat pieces, bearing crystals on the surface. 

 Notf. This specimen came from Eissoc arsenic works in Cornwall. 



c. Crystalline powder of a greyish colour. 



Note. This specimen is impure ; it came from a tin-smelting house. 



d. Pure, in white crystalline powder. 



363. ARSENIC PEROXIDE. As 2 5 , 3H 2 O. (Arsenic Acid, Peroxide 



of Arsenic.) 



a. Dirty-white porous lumps. . 



I. Solution. 



364. SULPHIDE. As 2 S 2 . (Realgar, Disulphide of Arsenic.) 



a. Deep-red lumps, with a conchoidal fracture and vitreous 



lustre. 



b. A Chinese carving in realgar. 



Note. Specimen b may be found under a shade in the east window of 

 the Chemical Museum. 



365. TRISULPHIDE. As 2 S 3 . (Orpiment.) 



a. Orange-yellow lumps. 

 6. Golden-yellow powder. 



BISMUTH. Bi.. 



366. METALLIC. 



a. Crystalline masses. 



367. CARBONATE. 2(Bi 2 C 3 ) H 2 0. (Bismuthi Carbonas, B.P.) 



a. White powder. 



368. NITRATE. Bi (N O s ) 3 5 H 2 0. 



a. Crystals. 



369. SUBNJTRATE. Bi N 3 , H 2 0. (Bismuthi Subnitras, B.P.) 



a. White powder. (Bismuthum Album, B.P., 1864.) 



