256 IRON CARBONATE 



applied externally. Citrate of iron and quinine, conjoining 

 the tonic properties of its components, and the less astringent 

 citrate of iron and ammonium are occasionally used for dogs, 

 in doses of 4 to 10 grains. Dialysed iron and amorphous 

 quinine have been conjoined. The phosphate (Fe 3 P 2 8 ) is 

 sometimes prescribed in diseases of the bones, in diabetes, 

 and in nervous exhaustion. It is occasionally given to 

 delicate dogs and foals, along with other phosphates, in the 

 form of Squire's Chemical Food, which contains the phos- 

 phates of iron, calcium, sodium, and potassium, and in 

 nervous depression with quinine and strychnine in the 

 preparation known as Easton's Syrup. 



The acetate, lactate, citrate, and tartrate, are very soluble, 

 readily absorbed, and only slightly astringent, are sometimes 

 preferred to the less expensive sulphate and carbonate. 



Ferratin, a brownish-red powder, prepared from alkaline 

 solution of tartarated iron and albumin, and containing 

 7 per cent, of iron, is prescribed as a tonic for dogs, in doses 

 of grs. 5 to grs. 30. 



IRON CARBONATE. Ferri Carbonas. Ferrous Carbonate. 



FeC0 3 . 

 S ACCHARATED IRON CARBONATE . Ferri Carbonas Saccharatus . 



The ferrous carbonate occurs in clay iron ore and in many 

 mineral waters. It is prepared by mixing solutions of iron 

 sulphate and ammonium carbonate. It is greyish-green, has 

 a chalybeate, inky-taste, and dissolves with brisk efferves- 

 cence in hydrochloric acid. Exposed to the air, it rapidly 

 absorbs oxygen, gives off carbonic anhydride, and becomes 

 converted into ferric oxyhydrate a change constantly 

 taking place along the banks of chalybeate streams. 



The saeeharated carbonate is greatly more stable. It is 

 made by rubbing the freshly-prepared carbonate with sugar 

 in a porcelain mortar. It occurs in small, coherent, grey 

 lumps, has a sweet, feebly chalybeate taste, and should 

 contain about 20 grains of ferrous carbonate in a drachm. 

 It is readily soluble, is a mild chalybeate, especially con- 

 venient in canine practice, and administered for the same 

 purposes as the sulphate. Doses, horses and cattle, 3 j- to 



