SELECTION AND MANAGEMENT. 65 



tense itching) and Intes at the wool 

 or paws with its foot tiying to scratch the 

 spot. If now you will carefully examine the 

 animal you will find under the wool at this 

 spot of infection the skin whitened and per- 

 haps exuding- a watery secretion. One can not 

 with the naked eye see the scab insects at 

 work. A little later this spot if untreated be- 

 comes a veritable scab and the adjacent re- 

 gions are attacked. It rapidly spreads through- 

 out the flock, the affected sheep rubbing against 

 posts and racks, dislodging mites that fasten 

 in turn upon other sheep. 



To cure scab thorough dipping is necessary. 

 To prevent it all sheep should be well dipped 

 after everj'' railway journey or exposure in 

 infected yards or pens. Dipping for preven- 

 tion is cheap and easy. Dipping for cure is 

 not so much harder. The main thing is to dip, 

 and dip thoroughly. 



THE DIPPING VAT. 



This should be a simple trough of wood or 

 metal or concrete, 16 inches wide, 4 feet deep 

 and as long as one wishes to build. The short- 

 er the vat the slower the process of dipping, 

 as the sheep when scabby must soak for two 

 minutes. For a farm vat a length of 10 feet 

 or 12 will be ample, as time can be allowed 

 them thoroughly to soak. The vat must be 

 narrow so that the sheep can not turn around 

 in it. It must be deep so that each sheep can 

 be plunged clear in all over so that no spot 

 will remain untreated. It is not necessary to 



