14 
SHEEP SCAB. 
Experiments on Sheep — On JN^ovember 10, one sheep, with 
moderately heavy live scab on the back, was treated with the 
Cooper Dip — one pound to ten gallons of water. 
The sheep was kept in the barn for a few days. Twenty-four 
hours after dipping the wool was still very wet. A lock was 
pulled and examined that contained forty-seven dead and nine 
living mites. 
At the end of forty-eight hours the wool was still moist. 
An examination showed a good number of dead and one living 
mite in the wool. 
On November 13 the sheep was examined again, and an 
occasional living mite was found. By far the greater number 
were dead. The living mites were fully grown, and could not 
have come from eggs since dipping. The sheep was examined 
November IG, and again December 5, and a few living mites 
found on both occasions. On December 12 it was dipped again 
as before. The sheep has shown no scab since. 
November 18, a bunch of forty sheep was treated with 
Cooper Dip, and the treatment was repeated December 1. In 
this bunch there were but three known cases of scab, and two 
of these were rather light. One sheep had a rather heavy, but 
not large, patch of scab on the rump. No farther signs of scab 
were noticed until January 7, when the sheep that had the some- 
what heavy scab on the rump was seen “digging,” and an ex- 
amination showed a small spot of fresh scab near the old one. 
This sheep was “patched,” and there have been no signs of scab in 
this bunch since. 
This dip has been largely used in this vicinity for some years, 
and is considered by many feeders as a good dip, but most of the 
men who have used it tell me that unless there is very slight 
signs of scab among their sheep they have to dip twice, and if 
the sheep are very scabby they nearly always have to do some 
“patching” after twice dipping. The expense of the dip is about 
twice that of the lime and sulphur. 
