182 



146. STRONTIUM OXIDE. Sr 0. 



a. Anhydrous, prepared from the nitrate by heat. 

 I. Hydrated, in crystals. Sr H 2 0^ 8H 2 0. 



147. SULPHATE. Sr S O v 



a. Native, in crystalline masses. (Celestine.) 



CALCIUM. Ca. 



148. ACETATE. Ca(C 2 H 3 2 ) 2 . 



a. Impure, obtained in the manufacture of acetic acid from 



the destructive distillation of wood. 

 &. Purified. 



149. BORATE. 



a. Native, in crystalline nodules. (Hayescine, Borocalcife, 

 Hydroborocalcite. ) 



Note. This specimen came from Singapore. It also contains some 

 borate of sodium. See Amer. Journ. Sc., vol. xlvi., p. 377 ; vol. xlvii. 

 p. 215, 1846 ; Dana, Mineralogy, p. 599. 



150. BUTYRATB. Ca(C 4 H 7 2 ) 2 . 



a. In amorphous masses, impure. 

 6. Crystallized, pure. 



151. CARBONATE. CaC0 3 . 



a. Native. ( White Marble.) 

 I. Ditto. (Black Marble.') 



c. Ditto. (Chalk.) 



d. Ditto, ditto, prepared by elutriation. (Prepared Chalk, 



Greta prceparata, B.P.) 



e. Ditto, prepared in China. 



/. Ditto, precipitated from the chloride of calcium. (Pre- 

 cipitated Chalk.) 

 g. Ditto, in crystalline powder. 



Note. Specimen g is a heavier powder than specimen /, and was pre- 

 pared by using concentrated solutions, and allowing the precipitate to 

 remain for some time in the mother-liquor. 



152. SODIO-CARBONATE. 



a. Native. (Gay Lussite.) 



Note. For analysis, see Ann. Ch. Phyt., vol. xxxi., p. 270 ; and Dana, 

 Mineralogy, p. 706. 



153. CHLORIDE. CaCl 2 . 



a. Anhydrous, impure. 



&. Ditto, pure, dried at 400 F. (Calcii Chloridum, B.P.) 



c. Crystallized. 



d. Fused, pure. 



