32 VETERINARY PARASITOLOGY 
II. 
B Arsenic 
Pot. carb. =e 
Sulphur aa 2 1b. 
Soft soap 
Water .. Ae oe .. 100 gals. 
Due precautions must be taken against poisoning by 
providing a draining-pen, and by placing dipped sheep 
in a yard free of herbage. Lambs must be kept apart 
from the ewes, or they may become poisoned by sucking. 
The arms of the men employed in dipping must be 
free from wounds. 
The following dips are recommended by the Board 
of Agriculture : 
III. 
B Sulphur i is 34 -» 25 1b. 
Quicklime si ae se -. 12$ Ib. 
Triturate until free from lumps, and boil with 20 gallons of 
water until dark red in colour, adding water up to 20 gallons 
to allow for loss by steam. When cool, decant and make 
up to 100 gallons. 
IV. 
BR Carbolic acid (97 per cent.) .. -» 3 quarts 
Soft soap is : eg -» § Ib. 
Water .. oi a ae .. ad 100 gals. 
Dissolve the soap in the carbolic acid and add the water. 
V. 
B Offal tobacco ies eet -» 35 1b. 
Water .. : +. 21 gals. 
Steep for four days; strain and press residue to obtain all 
the extract ; mix together ; add flowers of sulphur, 10 lb.; 
stir, and add water to 100 gallons, 
Symbiotic Mange in Sheep.— The Symbiotes ovis is 
a small parasite. It affects the limbs, especially the 
pasterns, and slowly extends upwards, and may reach 
above the knee and hock. Occasionally the armpits and 
groin are affected, with subsequent swelling of the limbs. 
