PER RUM. 77 



Source. Made by adding Hydrochloric Acid and Nitric Acid 

 to a hot solution of Iron Wire in Hydrochloric Acid and Water 

 (1) Fe + 2HC1 = Fed, + H 2 . (2) 6FeCL + 6HC1 + 2HN0 3 

 = 3Fe 2 01 6 + 4H 2 + 2NO. 



Characters. An orange-brown liquid, consisting of per- 

 chloride of iron, Fe 2 Cl 6 , in solution in water. Not given in- 

 ternally. 



Impurities. Ferrous salts. 



Preparations. 



a. Liquor Ferri Perchloridi. Pale brown. 1 to 3 

 of water. Dose, 10 to 30 min. 



h. Tinfitura Ferri Perchloridi. Light brown. 1 

 to 3 of spirit. flose^ 10 to 30 min. 



9. Liiauor Ferri Pernitratis. Solution of Per- 

 nitrate of Iron. 



Source. Made by dissolving Iron Wire in Diluted Nitric 

 Acid. 



Characters. A clear reddish-brown liquid, slightly acid 

 and astringent to the taste ; consisting of pernitrate of iron, 

 Fe 2 6N0 3 , in solution in water. 



Impurities. Ferrous salts. 



Dose. 10 to 40 min. 



Incompatibilities of Preparations of Iron in General. 



Alkalies and their carbonates, lime-water, carbonate of lime, 

 magnesia, and its carbonate, give green precipitates with 

 proto-salts, brown with persalts. Tannic and gallic acids give 

 a deep blue-black with persalts. Preparations of iron there- 

 fore tinge infusion of chiretta and hops, and change to brown 

 or black those of chamomile, cusparia, gentian, orange, cas- 

 caiilla, cloves, digitalis, cinchona, and all astringent infusions; 

 but they can be given in infusion of quassia or calumba. 



ACTION AND USES. 

 1. IMMEDIATE LOCAL ACTION AND T'SES. 



Externally. A solution of iron has a coiTiiiratin.u r and 

 astringent effect upon the broken skin and mucous si; 

 coagulating the albuminous tissues and plasma, and const ring- 

 ing or condensing the elements. The blood-vessels are thus 

 closed or diminished in size, not actively, 1ml by compression 

 from without; the circulation through them is dimii 

 hemorrhage, if present, is arrested ; and the abnormal escape 



