356 ALKALIES AND ALKALINE EARTHS 



200, Cinnamon water 400, water to make 1000. Dose. 

 Dog, gj— ij;30.— 60.0. 

 Calcii Carbonas Prcecipitatus. Precipitated Calcium Car- 

 bonate. Precipitated chalk. 



Precipitated chalk occurs as a fine white odorless and tasteless 

 powder. It is permanent in air, sparingly soluble in water, insolu- 

 ble in alcohol. 



Doses. H. gj—ij ; 30.0— 60.0. Dog, gr. x—lx; 0.65 — L 



Action and Uses. Externally and locally chalk is a desiccant, 

 feeble astringent and protective. 



Internally. Since chalk is not easily dissolved, it is a very 

 feeble and slow acting antacid, but is nevertheless useful when a 

 slow, continuous action is desired. It is protective to the gastro- 

 intestinal mucous membrane and resembles the action of the bismuth 

 salts in mechanically coating and protecting the irritated or inflamed 

 mucous membrane. On account of its cohesive tendency, prepared 

 chalk is to be preferred to the precipitated variety for internal use. 

 Chalk is less astringent and antiseptic than the various salts of bis- 

 muth, so that these salts are preferred for use in small animal prac- 

 tice. 



Administration. Chalk may be administered to horses and 

 cattle as a powder, in pill, capsule, or shake mixture in mucilage. 

 One of the official preparations is preferred for dogs. 



CALX — LIME 



Synonyms. Burned Lime, Quick Lime 

 Lime occurs as hard white or grayish masses, which in contact 

 with air gradually draw moisture and COj, and fall down as a 

 white powder. Lime is odorless, of a caustic taste, alkaline reaction, 

 soluble in VSO parts of water, insoluble in alcohol. 



Preparations. 



Liquor Calcis. Lime water. This is a saturated aqueous 

 solution of lime prepared by dissolving lime in water. 

 The chlorides are removed by first slaking the lime with a 

 small amount of water, which is discarded. More water 

 is then added. Doses. H. giv — vj ; 120. — 180. Dog, 

 Sj— viij ; 4.0—30.0. 



*8yrupus Calcis. Syrup of lime. Lime 65, sugar 400, 

 water to make 1000. Doses. Dog, Sss^j : 2 — 4. 



Linimentum Calcis. Carron Oil. Lime water and linseed 

 oil, equal parts. 



Calcii Hydras. Slaked Lime. N^ot used internally. 

 * Unofficial. 



