DISINFECTION 103 



brushes and all such articles should be disinfected. Dogs, rats, 

 and any of the smaller animals which are liable to convey the 

 disease should be guarded against. 



A pail spray pump is satisfactory for the small job ; whereas 

 a barrel spray pump is more practical for a larger job. About 

 fifteen feet of hose is usually needed with a piece of metal pipe 

 several feet long at the nozzle end. It pays well to strain very 

 carefully if lime or any sedimenting material is used. 



Attendants. — Attendants on sick animals should be most care- 

 ful about their clothing, particularly trousers and shoes. It is 

 well to use special overalls and overshoes, and leave them in the 

 infected stall or l)uilding. 



Burning a caxcass. — A cross-shaped trench about twelve 

 inches deep in the center, and shallow tow^ard the edges, about 

 seven feet long each way, is dug in the ground. The earth is 

 thrown in the angles, two bars of iron are placed across for a 

 bridge and the fuel placed upon the bars. The trunk of the 

 carcass is placed upon the fuel, another layer of fuel is added, 

 then the internal organs and limbs, and finally another layer of 

 fuel. The cross-shaped trench provides a draft — regardless of 

 the direction of the wind. Cheap fuel oil may prove a great 

 help, especially for cattle. 



Disinfectants 



Carbolic acid. — Pure carbolic acid is usually seen in the form 

 of light-colored crystals, sometimes slightly red. As sold in the 

 drug stores, it is usually liquefied by the addition of 5 to 8 per 

 cent of water. It is soluble in water up to about 6 per cent. It 

 is objectionable because it is very poisonous, and is not reliable 

 for some infections, hog cholera for instance. It does not de- 

 stroy clothing or corrode metals as corrosive sublimate does how- 

 ever. The best antidote for internal poisoning or external burns 

 by carbolic acid is probably alcohol, which may be given in 

 large doses for this purpose. For general disinfection use car- 

 bolic acid as a 5 per cent solution. 



Lysol. — Lysol has about the same qualifications as creolin and 

 compound cresol and acts in a similar manner. 



Compound cresol. — Compound cresol (Liq. Comp. Cresol), 

 is a dark l)rown li(|uid, consisting of cresol and linseed oil soap, 

 a standard formula, and can be prepared by any druggist. It 



