158 INOEGANiC AGENTS 



Derivation. — Obtained from bone ash (impure calcium 

 phosphate) by solution in hydrochloric acid and purified by 

 precipitation with ammonia water and by washing with 

 water. 



Properties. — A light, white, amorphous powder; odor- 

 less and tasteless and permanent in the air. Almost insol- 

 uble in cold water; insoluble in alcohol; easily soluble in 

 hydrochloric or nitric acids. 



Dose.—n., oii.-iv. (S.-15.) ; C, § ss.-i. (15.-30.); Sh. 

 & Sw., 3i.-ii. (4.-8.); D., gr.v.-xx (.3-1.3). 



Syeupus Calcii Lactophosphatis. Syrup of Calcium 

 Lactophosphate. (U. S. & B. P.) 



Precipitated calcium carbonate, 25; lactic acid, 60; 

 phosphoric acid, 36; orange flower water, 50; sugar, 725; 

 water, a suiEcient quantity to make 1,000. 



Dose. — Foals and calves, § ss.-i. (15.-30.); D., o i.-iv. 

 (4.-15.). 



Calcium Phosphate. 



'Action and Uses. — Calcium salts are most important 

 constituents of the body, being essential for the contractibility 

 of muscles, the activity of nerves, the coagulability of blood 

 and as calcium phosphate, forming 50 per cent, of bones. 

 Calcium salts mostly pass unchanged through the bowels. A 

 small amount is absorbed and eliminated by the large bowel 

 and by the kidneys. The food ordinarily contains an 

 amount of lime in excess of the needs of the body. By with- 

 holding lime from the food animals may develop conditions 

 similar to rickets. 



Rickets, however, is not usually due to lack of lime salts, 

 but to an abnormal condition in which the lime ingested can 

 not be deposited in the bones, although abounding in the 

 blood. Lime being deficient in the bones in rickets and osteo- 

 malacia, it has been given in these conditions and also in 

 caries and fragilitas ossium. Unless the food has been de- 

 ficient in calcium salts their use will probably be of little 

 benefit. 



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