153 INORGANIC AGENTS 



each dose of bismuth; or better, in capsules, dispensing one grain of 

 carbolic acid and five grains of bismuth. The sedative effect upon the 

 stomach is increased by giving the subcarbonate of bismuth with bicarbo- 

 nate of sodium, while the sedative effect upon the bowels is enhanced by 

 combining morphine with bismuth subnitrate. 

 For diarrhea in dogs or cats : 



Tincturae opii camphoratae. 



Bismuthi subcarbonatis aa Bss. 



Misturse cretse ad §ii. 



M. (Shake.) 



Sig. % to 2 teaspoonfuls every 3 hours according 

 to age and size. 



It is generally immaterial whether the subnitrate or subcarbonate 

 of bismuth be selected in any given case. Bismuth salicylate is more 

 powerful as an antiseptic than the other salts. It is useful in diarrhea, 

 intestinal fermentation and indigestion of dogs. The drug should be 

 given in capsules. 



SECTION V. 



Ferrum. 



Metallic iron is official in the form of fine, bright and non-elastic 

 wire, from which are made iron preparations and reduced iron. 



Fehhum Redtjctum. Reduced Iron. (U. S. P.) 



Synonym. — Ferrum redactum, B. P.; iron by hydrogen, Quevenne's iron, fer- 

 rum hydrogenio reductum, ferrum ope hydrogenii paratum, E. ; ferrum redactum, 

 P. G.; fer rfiduit par rhydrog6ne, Fr. ; reducirtes eisen, G. 



Derivation. — Hydrogen gas is passed over freshly made and carefully washed 

 ferric oxide in a hot and closed tube. Fe^Oj-j-B Hj = Fe^-j-S H2O. 



Properties. — A very fine grayish black, lusterless powder, without odor or 

 taste; permanent in dry air; insoluble in water or alcohol. 



Dose.—n., 5i-ii, (4-8); C, 3ii-iv, (8-15); Sh. & Sw., gr.xx-xxx, (1.3-2); D., 

 gr.i-v, (.06-.3). 



Fehri Sulphas. Ferrous Sulphate. Fe SOj-j-T H,0. (U. S. & B. P.) 



Synonym. — Copperas, green vitriol, vitriolura martis purum, sulfas ferrosus, 

 ferrum vitriolatum purum, E.; ferrum sulphuricum purum, P. G. ; sulfate de fer, 

 sulfate ferreux, Fr. ; schwefelsaures eisenoxydul, G. 



Derivation. — Iron wire is dissolved by boiling in diluted sulphuric acid. Fe,-|-2 

 H2S04 = 2 Fe S04-f-2 H,. 



Properties. — Pale, bluish-green, monoclinic prisms, without odor, and having 

 a saline styptic taste; efflorescent in dry air. On exposure to moist air the crys- 

 tals rapidly oxidize and become coated with brownish-yellow, basic ferric sulphate. 

 When it has thus deteriorated the salt must not be used for any official purpose. 

 Soluble in 1.4 parts of water; insoluble in alcohol. 



Dose.—n., 3i-ii, (4-8); C, 3ii-iv, (8-15); Sh. & Sw., gr.xx-xxx, (1.3-2); D., 

 gr.i-v, (.06-.8). 



Fehri Sulphas Exsiccatus. Exsiccated or Dried Ferrous Sulphate. 

 FejSo,-j-3 H2O. (U. S. & B. P.) 

 Synonym.—Ferrum sulfuricum siccum, P. G.; sulfate de fer dess6chg, Fr.; 

 entwasserte schwefelsaures eisenoxydul, G. 



Derivation.— Allow ferrous sulphate, 100, to effloresce at a temperature of 

 104° F. Then heat on a water bath till the product weighs 65. 



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