412 THE MANAGEMENT AND FEEDING OF CATTLE 



be necessary at intervals of five or six days to destroy 

 the mites tliat may be hatched in the interval. Of course, 

 thorough disinfection of the stalls, mangers, and floors 

 should be given. Remedial measures should not be 

 allowed to slacken until the trouble has been completely 

 removed, or soon the entire work will have to be done 

 over again. 



Under range conditions, it is, of course, only prac- 

 ticable to treat cattle for mange by means of dipping 

 or spraying. The Department of Agriculture has given 

 formulas for making various dips, as, for instance, those 

 known as " lime and sulphur " and " tobacco and sul- 

 phur " dip. They are used in properly constructed vats, 

 in passing through which the cattle are submerged. 

 They remain in the dip for two minutes and must be 

 dipped again in eight or ten days before a clean bill of 

 health can be secured for them. If dipped in an emul- 

 sion of crude petroleum and water made as directed by 

 the department, but one dipping is called for. 



The labor involved in dipping has apparently, in a 

 great measure, been rendered unnecessary by the in- 

 vention of what is known as the Seabury spraying 

 machine. It operates at one end of a cattle chute 

 through which the animals are driven. The crude oil 

 and water, used in the proportions of i and 4 parts, 

 respectively, is so continuously agitated as to become 

 thoroughly admixed. It throws the liquid with such 

 force through numerous nozzles that it saturates most 

 thoroughly. The oil remains on the skin and hair for 

 several weeks, hence the nits that hatch are destroyed 

 so that but one dipping is necessary, and lice, if present, 

 are destroyed at the same time. Cattle sprayed but 

 once by this machine, under proper supervision, will be 

 given a clean bill of health. 



This remedy is best applied in the spring, the rea- 

 sons for which are as follows: (i) The cattle are re- 

 moved from winter quarters, where disinfection is dif- 



