MEDICINES AND THEIR DOSES. 23 



vent too rapid purging. As a purge calomel should be 

 combined thus : For horses — calomel, 1 dram, aloes, 4 

 drams. Cattle — calomel, 1 to 2 drams, Epsom or com- 

 mon salt, 1 lb., or oil, 1 pint. As a vermifuge (worm 

 destroyer) for horses : Calomel, oil of male shield fern, 

 and aloes, 1 dram each ; ginger, 4 drams, in ball, with 

 linseed meal and molasses. As an emetic for dogs or 

 swine : Calomel, 2 to 3 grains ; tartar emetic, same ; or 

 (in place of tartar emetic) 15 to 20 grains ipecac. Calo- 

 mel destroys the acari Qmrasites) of scab and mange, kills 

 lice, abates the itching of eczema and prurigo, removes 

 the scales and heals the cracks of psoriasis, hastens the 

 removal of warts, and is one of the best remedies for thrush 

 in the horse's frog. In the form of ointment, it relieves 

 piles in dogs. It should be used discreetly. 



Mercuric Chloride (Corrosive Sublimate).— Horses 

 and cattle, 5 to 8 grains ; sheep and large pigs, 1 grain, 

 in water or other simple fluid. For most external uses, 

 a solution is made of 2 to 5 grains to the oz. of water. 

 For itching — corrosive sublimate, 2 grains, prussic acid, 

 2 drops, water, 1 oz. Ointment — corrosive sublimate, 1 

 part, fatty matters, 12 to 20 parts, usually the latter; 

 used for skin and parasites. 



Mustard. — As a stomachic, carminative, or mild stim- 

 ulant horses take 4 to 6 drams; cattle, \ to 1 oz. ; sheep 

 and swine, 1 to 2 drams, in pill or electuary (confection.) 

 Large doses act as emetics in dogs, cats, and swine. 



Myrrh. — (A brown-red gum-resin, from the coasts of 

 the Red Sea. ) Horses and cattle, 2 drams ; sheep and 

 swine, \ to 1 dram, several times daity, in ball, decoc- 

 tion, or tincture ; used with other tonics or with aloes. 



Nux Vomica (Strychnine). — Of powdered nux vomica 

 horses take \ to 1 dram ; cattle, 1 to 2 drams ; sheep, 

 10 to 40 grains; swine, 10 to 20 grains. The extract is 

 8 or 10 times as active as the powder. A tincture is 

 sometimes used. Strychnine is more uniform and more 



