30 The Sheep-Scab. 



ing out again within a few weeks, and that he is 

 as far as before from effecting a cure. 



When the young are hatched, they can be 

 destroyed, but not before, and until each and 

 every acarus is exterminated, the sheep owner 

 cannot feel confident that a positive cure has 

 been established. The period of incubation does 

 not exceed sixteen or eighteen days; the first 

 dipping will destroy all living parasites and 

 those that acquire life during the ensuing seven 

 days; at the end of that time the operation must 

 be repeated, in order to kill all those insects that 

 are hatched during the following week; while a 

 fortnight from the time of the first immersion, 

 the sheep should be submitted to a third and last 

 plunge into the decoction. This final treatment 

 will effectually dispose of all the acari that may 

 come after, leaving the animal free from this 

 noxious disease, and giving to it a new lease of 

 life and enjoyment, as well as remuneration to 

 the owner for the time and labor expended. 



The best time to dip the sheep is when the 

 wool has attained a moderate growth, say about 



