TREATMENT OF MANGE AND ^CABIES 125 



tributing to a rational treatment designed to rid the sheep of the disease 

 by killing the parasites. The application by hand of either ointments, 

 fluid preparations, or powders for this purpose is practically useless. 

 The acaricide chosen for the treatment of psoroptic scabies of sheep 

 should be applied by dipping. It is better not to consume time, energy, 

 and patience upon remedies which are not or cannot be used by this 

 method. 



Lime and Sulphur Dip. — Many formulae for dips have been pub- 

 lished, most of them containing lime, sulphur, tobacco, or arsenic as 

 their base. The term "lime-and-sulphur dip" does not refer to an 

 exact formula but includes a large number of formulae containing the 

 lime and sulphur in different proportions. While the ingrediants of a 

 dip should be in such proportion as to make it a reliable parasiticide, it 

 is essential that it should cause little or no harm to the sheep or fleece. 

 The subject of dips has been carefully gone into by the United States 

 Bureau of Animal Industry and the conclusion reached that probably 

 the most effective dips are those containing sulphur and tobacco, and 

 sulphur and lime of such strength that they are not injurious to the sheep 

 and of minimum damage to the fleece. Among the formulae for lime and 

 sulphur dips mentioned by the Bureau are the following (Farmer's 

 Bull. No. 159) : 



No. 1 



Flowers of sulphur 24 lbs. 



Unslaked lime 8 lbs. 



Water 100 gals. 



No. 2 



Flowers of sulphur 33 lbs. 



Unslaked lime 11 lbs. 



Water 100 gals. 



For fresh scab, formula No. 1 will act as well as those with a greater 

 amoimt of lime. In old cases with parchment-like scab a stronger dip, 

 as formula No. 2, is to be preferred. 



The following method of preparing the mixture is recommended by 

 the Bureau: 



"A. Take eight to eleven pounds of unslaked Ume, place it in a mortor 

 box, kettle, or pail of some kind, and add enough water to slake the Hme 

 and form a 'lime paste' or 'lime putty.' 



"Many persons prefer to slake the lime to a powder, which is to be 

 sifted and mixed with sifted sulphur. One pint of water will slake three 

 pounds of lime, if the slaking is performed slowly and carefully. As a 

 rule, however, it is necessary to use more water. This method takes 

 more time and requires more work than the one given above, and does 



