260 CHLORIDE OF IRON SOLUTION 



serviceable in swellings of joints, and has been commended 

 for its efficacy in polyuria and nasal gleet in horses. The 

 doses are the same as those of the sulphate. It is prescribed 

 in bolus, saccharated powder, and in the form of the official 

 syrupus ferri iodidi. This syrup, containing about 5J grains 

 of ferrous iodide in each drachm, is frequently given in the 

 later stage of canine distemper and bronchitis, in doses of 

 Tl\x. to Tl\xxx. 



IRON PEROXIDE MOIST. Ferri Peroxidum Humidum. Moist 

 Ferric Oxide, Fe 2 3 .(H 2 0), with about 86 per cent, of 

 uncombined water. 



Red or ferric oxide is found native in the several varieties 

 of haematite, ochre, red chalk, and specular ore. The hydrate 

 may be prepared by mixing together three ounces of liquor 

 ferri perchloridi and one ounce of sodium carbonate diluted 

 with water. This moist ferric oxide, freshly prepared, is the 

 best antidote for arsenic. Twelve parts are stated to 

 neutralise one part of arsenious acid. It mechanically 

 absorbs the dissolved poison, and further converts it into 

 an insoluble arsenite. The antidote should be followed by 

 a saline purgative. In human patients doses of a dessert- 

 spoonful of the peroxide are given every five or ten minutes. 

 Another arsenic antidote is the ferri oxidum hydratum cum 

 magnesia, made by mixing a solution of magnesia with a 

 solution of iron persulphate (U.S. P.). 



IRON PERCHLORIDE. Ferri Perchloridum. Ferric Chloride. 

 Fe 2 Cl 6 . Liquor Ferri Perchloridi Fortis. 



Iron perchloride is prepared by boiling the metal in hydro- 

 chloric acid and water, and adding a little nitric acid to 

 ensure production of the higher chloride. The green crystals, 

 having a great affinity for water, quickly melt. The strong 

 solution, liquor ferri perchloridi fortis, is orange-brown, 

 odourless, with a styptic taste, and miscible with water and 

 alcohol in all proportions. Specific gravity about 1*42 ; 110 

 minims contain 22J grains of iron. Diluted with three 

 measures of distilled water, it constitutes the medicinal 



