64 SYNOPSIS OE VETERINARY 



A phosphite is formed by the union of phosphorus acid with 

 a base. A base may be soda, zinc, copper or any other substance. 

 Whenever a salt ends in "ide" it is formed by the union of an 

 element with a base (thus iron oxide, iron and oxygen, iron 

 phosphide, iron and phosphorus, etc.) Whenever a salt ends 

 in "ate" it shows the union of an acid ending in "ic" with a base. 

 (Thus, iron phosphate, iron and phosphoric acid, iron sulphate, 

 iron and sulphuric acid, etc.) When the salt ends in "ite" it is 

 composed of an acid ending in "ous," and a base (thus, sodium 

 sulphite, sodium and sulphurous acid.) 



IRON AND ITS PREPARATIONS. 



There are 40 official preparations of iron, and a number of 

 unofficial preparations, quite a few of which are impracticable for 

 use in veterinary practice, consequently we will consider only 

 those which are practicable for our use. They nearly all have 

 the same action only to a dfferent degree. Some are more irritat- 

 ing than others and some have special actions due to other drugs 

 combined with the iron. 



FERRI CARBON AS SACCHARATUS.—A greenish gray 

 powder, odorless, having at first a sweetish, slightly ferruginous 

 taste. It is only partly soluble in water. 



Doses. — Horse, 1 to 3 drs. ; sheep and pigs, 10 to 20 grs. ; 

 dogs, 3 to 10 grs. It is used when the stomach is irritable. 



FERRUM REDUCTUM— Reduced Iron- -Powdered Iron. 

 — Doses, human, 3 to 6 grs. ; horse, 1 to 3 drs. ; dog, 1 to 5 grs. 

 It is used on account of its being non-astringent and non-irritat- 

 ing to the stomach. 



FERRI SULPHAS — Sulphate of Iron. — Known as copperas 

 and green vitriol, bluish gray crystals, which on exposure to the 

 air, effloresces and changes its color, is wholly soluble in 1 and J4 

 times its quantity of water. Dose, a little more than the exsiccated 

 sulphate. 



It is an astringent, haematinic (blood tonic) and disinfectant. 

 On account of its efflorescing tendency, it should be kept in bottles 

 with glass stoppers. 



FERRI SULPHAS EXSICCATUS— Dried Sulphate of 

 Iron. — A greenish white powder soluble in water with the excep- 



