SESTOEATIVE AGENTS. 43 



parts of water, and insoluble in alcohol. Dose: H., 

 3 i.-iij. ; D., gr. i.-iij. (Best given in aqueous solu- 

 tion as it is very irritant and astringent.)* 



Ferri Sulphas Exsiccatus—dxiedi sulphate of iron, 

 is the preceding salt deprived of its water of crystal- 

 lization. The same in action, but the dose is only 

 half of that given of the other. 



Ferri Perc/iZorid^TO— perchloride of iron. Orange- 

 yellow crystalline pieces, very deliquescent, odorless 

 or but slight odor of hydrochloric acid, strongly styp- 

 tic taste, and acid reaction. Freely soluble in water, 

 alcohol, and ether. 



Liquor Ferri Perchloridi — solution of perchloride 

 of iron, an aqueous solution containing thirty-eight 

 percent, of the salt. Dose: H., fl. 3ss.-i. ; D., 

 TTl i.-v. 



Tinctura Ferri Chloridi — tincture of chloride of 

 iron (liquor 35, alcohol 65). Dose: H., fl. 3 ij.- 1 i. ; 

 D., TTl v.-xx. 



Gossypium Hcemostaticum — styptic cotton, made 

 by dipping absorbent cotton in water, squeezing out, 

 then dipping it in a solution of chloride of iron, again 

 squeezing out superfluous liquid and drying. 



Medicinal Actions op the Iron Peepakations. 



Iron carbonate is a mild chalybeate, especially used 

 in canine practice, and is employed in the same dis- 

 eases as the sulphate. 



Iron sulphate is a restorative tonic, and in larger 

 doses astringent and irritant. Externally — stimu- 



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