316 INORGANIC AGENTS 



Sheep are dipped to advantage in 2 per cent, solutions, 

 to destroy ticks, instead of the more dangerous arsenical 

 liquids. Creolin (of Merck) may be used internally, as an 

 intestinal antiseptic and anthelmintic. One ounce given on 

 an empty stomach, in a quart of water, is one of the most 

 effective vermifuges for the horse. 



Lysolum. LysoL 

 (Non-official.) 



Derivation, — From that part of tar oil which boils 

 between 190° and '200° C, by dissolving in fat and saponi- 

 fying in alcohol. 



Properties. — A clear, brown, oily liquid, of a feeble, 

 creasote-like odor. Soluble in water, forming a clear, frothy, 

 soapy fluid, and in alcohol, chloroform, and glycerin. Lysol 

 contains 50 per cent, of cresol. 



Lysol is used as a substitute for creolin, in ^ to 2 per 

 cent, aqueous solution. It is a powerful antiseptic, and is 

 stated to be more efficient and half as poisonous as creolin, 

 and only | as toxic as carbolic acid. Lysol solutions do 

 not obscure instruments, nor damage the hands of the 

 operator. The drug is undoubtedly a very useful one. 



Naphtol. Naphtol. C,„H,0 H. (U. S. P.) 



Synonym. — Beta naphtol. 



A phenol occurring in wood tar, but usually prepared 

 artificially from naphthalin. 



Derivation. — Naphthalin is treated with strong sulphuric 

 acid. B- naphthalin sulphonic acid is formed (C10H7 H SO3). 

 The latter acid is dissolved in water with milk of lime, and 

 the resulting calcium salt is recovered by crystallization. 

 The crystals are then dissolved in water and treated with 

 sodium carbonate, when sodium naphthalin-sulphonate (Cm 

 H^SOgNa) results. The latter is mixed with fused sodium 

 hydroxide, when sodium naphtol (Cjo H^ O Na) and sodium 

 sulphite are obtained. Hydrochloric acid is added to the 



