PSOROI>TIC MANGE — SHEEP SCAB. 629 



experience with properly prepared dip, its injury to the wool is 

 strongl}' and steadfastly denied by the Agricultural Department of 

 Cape Colony. 



It is believed that a certain amount of -justice is attached to this 

 objection to lime and sulphur as generally used ; unless, therefore, 

 lime and sulphur can be used in a way which will not injure the 

 wool to an appreciable extent, we should advise against its use in 

 certain cases ; in certain other cases the good accomplished far out- 

 weighs the injury it does. Let us, therefore, examine into this 

 damage and its causes. 



The usual time for dipping sheep is shortly after shearing, when the 



Fig. 258. — A more advanced case of common scab. 



wool is very short ; whatever the damage at this time, then, it can be 

 only slight, and the small amount of lime left in the wool will surely do 

 but little harm. 



In full fleece lime and sulphur will cause more injury. In Austraha 

 the deterioration was computed by wool buyers at 17 per cent., although 

 in Cape Colony the Department of Agriculture maintains that if properly 

 prepared, and if only the clear liquid is used, the sediment being thrown 

 away, the official lime-and-sulphur formula will not injure the long wool. 

 The United Slates Bureau of Agriculture have found some samples of 

 wool injured by dipping, while on other samj)les no appreciable effect 

 was noticeable. 



If a lime-and-sulphur dip is used, care must be taken to give the 



