254 INORGANIC AGENTS 



Betanaphtholis gr.l. 



Adipis Si. 



M. 



S. Apply externally. 



Internally it is employed to kill round and tapeworms, and as an 

 antiseptic in intestinal fermentation. Against hookworm in dogs 10 gr. 

 are given in capsules, repeated in 2 hours, preceded by fasting and a 

 laxative, and followed by castor oil. Oil of chenopodium is more effec- 

 tive. Naphthol should be given in keratin coated pill (to avoid irritating 

 the stomach), or capsules, to dogs, and in ball to horses. 



Methyl Blue. Pyoktanin. (Non-official.) 

 Occurs in small indigo-colored crystals, slightly soluble in water, freely solu- 

 ble in alcohol. It is often contaminated with arsenic and should be perfectly pure 

 when used in medicine. It is slightly antiseptic and astringent. Methyl blue is 

 used in the treatment of catarrhal and purulent conjunctivitis, eczema of the 

 lids and blepharitis as follows: 



Methyl blue gr.ss. 



Aquae destillatae gl. 



M. 



S. Drop in eye 3 times daily. 



Methyl blue is a favorite preparation for the cure of small wounds, galls, and 

 chafes in veterinary practice as below. The purple staining of the skin may be 

 removed by washing with soap and water and alcohol. 



Methyl blue gr.ss. 



Tincturas iodi T11,xx. 



Unguenti zinci oxidi. 



Petrolati aa oSS. 



M. 



S. Apply externally. 



Resorcinol. CoHeOj. (U. S. P.) 



Synonym. — Resorcinum. Resorcin. Metadioxybenzol, E.; rSsorcine, Fr. ; 

 resorcin, G. 



Derivative.- — A diatomic phenol formed by the action of fuming sulphuric 

 acid upon benzine, whereby benzine metadisulphonic acid [CeHj (H S 03)2] 

 results. The latter is neutralized by milk of lime; calcium sulphate is expressed, 

 and sodium carbonate is added. The process is continued by filtration, and the 

 filtrate evaporated to dryness. The residue is heated with sodium hydrate, with 

 the formation of sodium resorcin [CeH, (O Na)2]. 



Sulphurous acid is driven off from sodium resorcin by boiling, and the result 

 is extracted with ether; impure resorcin is recovered by distillation, and is purified 

 by sublimation or by recrystallization from water. 



Properties. — Colorless, or nearly colorless, needle-shaped crystals, or as a 

 powder; having a faint, peculiar odor, and a sweetish, followed by a bitter, taste. 

 It acquires a pink tint on exposure to light and air. Soluble in 0.9 part of water, 

 and in 0.9 part of alcohol; freely soluble in ether or glycerin, and slightly soluble 

 in chloroform. 



Dose. — H., 3iv-vi, (15-24); foals and calves, 3ss-i, (2-4); D., gr.ii-v, (.12-.3). 



Action and Uses. — Resorcin was originally employed as an anti- 

 pyretic, but is not now used for this action, being too depressing to the 

 heart. It is an efficient antiseptic, externally and internally; possesses 

 a slight local anesthetic effect, and a milder action, topically, than phenol. 



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