Psoroptic Acariases in Sheep. 185 



parted from head to tail at intervals of two inches and the salve 

 rubbed in until all scabs are broken up and the surface thoroughly 

 covered. Applied in the absence of scab as a simple protection 

 and general parasiticide the wool is parted to the skin in lines four 

 inches apart and the salve is rubbed in along the whole length of 

 the line. 



Pouring. For pouring, the following mixture is appropriate : 

 decoction of i lb. of tobacco in 20 pints of water, soft soap i lb., 

 sulphur % lb., oil of tar 40 ozs. This suffices for 20 sheep. The 

 first three agents are mixed, then one pint of the mixture is taken 

 in an oiler, 2 ozs. of oil of tar added and the compound used on a 

 single sheeo. The wool is parted from head to tail, as in salving 

 and the liquid poured on the skin along the line, and in cases of 

 scab well rubbed in. In the absence of scab the finger is only- 

 drawn along the line of liquid so as to press it into the roots of 

 the adjacent wool. An- important element in pouring is to keep 

 the oiler continually shaking so as to prevent the oil of tar from 

 separating from the mass of the liquid, and irritating the one 

 place on which it is applied. 



Among other pouring preparations may be named tobacco i lb., 

 black hellebore ij^ lbs., water 20 quarts. 



Dipping. For large flocks dips have virtually superseded both 

 of the above methods. For a length of time the standard dips 

 were arsenical or mercurial. 



As an example of an arsenical dip the following may be 

 given: Arsenious acid (white arsenic) 20 lbs., soda ash 20 lbs., 

 sulphur 2 ozs. , soft soap 4 lbs. These are dissolved in 4 gallons 

 of boiling water, then enough cool water is added to make a total 

 of 50 gallons, which will suffice for 50 sheep. Some add a little 

 aloes to make the liquid bitter and unpalatable and to give a color 

 which will distinguish it at once from ordinary drinking water. 



A great variety of apparatus are in use but a simple bath for a 

 small flock may be made of a wooden box (waterproof) four feet 

 long at the bottom, two feet wide and three feet deep, and having 

 an inclined plane extending up from the bottom at each end and 

 furnished with ramps to give foothold. At one end is a yard 

 holding the sheep waiting to be dipped, and from the other is 

 continued a slightly inclined wooden enclosure for the dipped 

 sheep to receive the drippings from their fleeces and run them 



