406 SALTS OF THE HEAVY METALS 



Therapeutics. The above preparations are used only as hema- 

 tinics. Since they are comparatively free from astringent action 

 they are convenient ways of administering iron. The saccharated 

 carbonate or Blaud's pills are usually preferred. 



FERRI lODIDUM — FERROUS IODIDE 



Synonym. Protiodide of Iron 



Iodide of iron occurs as white crystalline masses, soluble in water 

 with partial decomposition. It is used in the following preparations : 



Syrupus Ferri lodidi (5 per cent, by weight of the salt). 



Dose. D. niv— xx; 0.3—1.3. 

 Pilulce Ferri lodidi (each one grain of the salt). Dose. D. 



1—2 pills. 



These preparations may be used when it is desired to combine 

 the action of iron and iodine. They are of some value in adenitis 

 and rachitis. 



FERRI SULPHAS — FERROUS SULPHATE 



Synonyms. Green Vitriol, Copperas, Iron Protosulphate 



Iron sulphate occurs as pale bluish-green monoclinic prisms, 

 without odor, and having a saline styptic taste: efflorescent in dry 

 air. On exposure to moist air the crystals oxidize and become 

 coated with brownish yellow, basic ferric sulphate, in which con- 

 dition it should not be used. It is very soluble in water, insoluble 

 in alcohol. 



"" ^ " gr. XV — XXX ; 



Ferri Sulphas Exsiccaius — Dried ferrous sulphate. 



Doses. H. 3 j — ij ; 4. — 8. Sh. and Sw. gr. viij— xv ; 0.5—1. 

 D. gr. j— v; 0.06—0.3. 

 Ferri Sulphas Granulaius — Granulated ferrous sulphate. 



Doses. Same as for iron sulphate. 



Therapeutics. Ferrous sulphate is an astringent externally. 

 Internally it is astringent and hematinic and consequently .is very 

 serviceable in foi-ms of anemia with looseness of the bowels. The 

 dried sulphate is often prescribed for the large animals. 



Copperas is quite extensively used as a disinfectant and de- 

 odorant for cesspools, etc. 



