506 IOWA DEPARTMENT OF AGKICULTUUE. 



(4) Ten days later dip the entire floclt a second time. 



(5) After the second dipping place the flock on a portion of the 

 farm from which they have been excluded during the previous four or 

 five weeks. 



(6) Use the dip at a temperature of 100° to 110" F. 



(7) Keep each sheep in the dip for two minutes by the watch — do 

 not guess at the time — and duck its head at least once. 



(8) Be careful in dipping rams, as they are more likely to be over- 

 come in the dip than are the ewes. 



(9) Injury may, however, result to pregnant ewes, which must, on 

 this account, be carefully handled. Some farmers arrange a stage, with 

 sides, to hold the pregnant ewes, which is lowered carefully into the vat, 

 and raised at the proper time. 



(10) In case a patent or proprietary dip, especially an arsenical dip, 

 is used, the directions given on the package should be carried out to the 

 letter. 



CHOICE OF A PREPARATION FOR DIPPING. 



Numerous different sheep dips are recommended by various parties 

 and undoubtedly many of them are efficacious; few can be named which 

 some persons do not consider far superior, and other persons consider far 

 inferior, to all dips known; few can be found which have not cured 

 cases of scab, and probably none can be named with which failures have 

 not been reported. Under these circumstances the farmer should not be 

 deceived by exaggerated statements in either extreme. He should know 

 the composition of the material he is using. If he desires to use a ready- 

 made dip, let him inform himself of its exact nature in order to prevent 

 impositions and guard against dangers. He would do well to refuse to 

 purchase any prepared mixture which does not bear on the package a 

 printed statement of the ingredients and their proportions, which the 

 manufacturer guarantees are to be found . in that package; he would 

 also do well to avoid any compound which irresponsible parties adver- 

 tise as "the only sure cure for scab," etc. 



SUCCESS WITH HOME-MADE DIPS. 



While a remedy should not be condemned simply because it is pre- 

 pared ready for use, the value of home-made dips is insisted upon, and 

 attention is called to the fact that it was almost entirely through home- 

 made mixtures that scab was eradicated from certain of the Australian 

 colonies. As statements have been made that scab was eradicated from 

 the English colonies by killing the scabby sheep or by the use of prepared 

 dips, it may be well to say that these statements are erroneous. An act 

 was passed in New South Wales about 1851 for the slaughter of scabby 

 she^ep, and a few remaining straggling flocks were destroyed under that 

 act; but on the reappearance of scab in that colony in 1863, by infection 

 from Victoria, the act was repealed and the whole of the scabby sheep, 

 about 400,000, were completely cured by means of tobacco and sulphur. 



