LIME 147 



preferable to chalk for the smaller animals. It is excreted 

 unchanged in the faeces. 



Administration.— Calcium carbonate may be given to 

 dogs in troches, pills or powder ; to other animals in powder, 

 balls or electuary. Chalk is commonly prescribed suspended 

 in flour gruel, milk or mucilage to the larger animals. The 

 official preparations are suitable for dogs. 



Uses. — Chalk forms a dusting powder for moist eczema, 

 slight burns, and intertrigo. Zinc oxide and starch (1 to 4) is, 

 however, a better preparation. Chalk is the most useful 

 antacid for diarrhoea accompanied by fermentation of the 

 intestinal contents, while its local astringent and protecting 

 influence assist in overcoming the trouble. It is especially 

 good for foals and calves given in flour gruel, and often 

 combined with catechu, ginger and opium. The following 

 prescription is appropriate for dogs with diarrhoea : 



Tine, kino, tine, catechu co. and tine, opii camphor, aa 



5ss.; mistura cretse to make '^iv. S. Teaspoonful every 



three hours. A serviceable ball for horses with diarrhoea 



contains: Creolin, chalk and ginger, aa ^ss.; powdered 



opium, 3 i. 



Calx. Lime. CaO. (U. S. & B. P.) 



Synonym. — Burned lime, quicklime, calcaria, calx viva, 

 calx usta, oxydum calcicum, E.; calcaria usta, P. G.; chaux, 

 chaux vive, Fr.; kalk, gebrannter kalk, G. 



Derivation. — Prepared by burning white marble, oyster 

 shells, or the purest varieties of natural calcium carbonate, 

 to expel carbon dioxide. 



Properties. — Hard, white, or grayish-white masses, which 

 in contact with air gradually attract moisture and carbon 

 dioxide and fall to a white powder ; odorless ; of a sharp, 

 caustic taste. Reaction intensely alkaline. Soluble in 

 about 750 parts of water ; insoluble in alcohol. 



PREPARATIONS. 



Liquor Calcis. Solution of Lime. (U. S. & B. P.) 

 A saturated, aqueous solution of calcium hydrate. 



