ANIMAL PARASITES OF CATTLE. 521 



slaked lime), 24 pounds of floAvers of sulphur, and 100 gallons of 

 water. 



DirectioTis for preparing 100 gallons of dip. — Weigh out the lime, 

 12 pounds (or hydrated lime, 16 pounds), and sulphur, 24 pounds. 

 Place the unslaked lime in a shallow, water-tight box similar to a 

 mortar box, or some other suitable vessel, and add water enough to 

 slake the lime and form a lime paste or lime putty. Sift into this 

 paste the flowers of sulphur and stir well ; then place the lime-sulphur 

 paste in a kettle, boiler, or tank containing 30 gallons of water, the 

 water being first heated nearly to the boiling point. Boil the mixture 

 for two hours at least, stirring frequently; add water occasionally 

 to maintain the original quantity. AIIoav the mixture to settle in the 

 tank or draw the entire contents of the kettle or boiling tanlc into a 

 large tub or barrel placed near the dipping vat and provided with a 

 bunghole about 4 inches from the bottom, and then allow ample time 

 to settle — from two to three hours or more if necessary. When fully 

 settled, draw off the clear liquid into the dipping vat, taking care 

 not to allow any of the sediment to accompany it, as the sediment is 

 liable to render the dip unnecessarily caustic. The clear liquid thus 

 obtained only requires the addition of sufficient clear warm water to 

 bring the total up to 100 gallons. Flowers of sulphur must be used, 

 and the lime must be of good quality. 



The dipping bath should be used at a temperature of 100° to 105° 

 F., and for official dippings must be maintained at all times at a 

 strength of not less than 2 per cent of " sulphid sulphur " as indi- 

 cated by the Bureau of Animal Industry field test for lime-sulphur 

 baths. 



NICOTIN DIP. 



The nicotin dip is made with sufficient extract of tobacco, or 

 nicotin solution, to give a mixture containing not less than five 

 one-hundredths of 1 per cent nicotin and 2 per cent flowers of sul- 

 phur. Sufficient nicotin would therefore be furnished for 96 gallons 

 (about 800 pounds) of dip by 1 pound of a 40 per cent solution of 

 nicotin. The formula for this dip would be: Nicotin, four-tenths of 

 a pound ; flowers of sulphur, 16 pounds ; water, 96 gallons. 



To calculate how much nicotin solution or extract of tobacco 

 should be used for 96 gallons of water, divide the quantity of nicotin 

 required in the dip by the proportion of nicotin in the extract. For 

 example, suppose the nicotin solution contains 25 per cent nicotin, 

 we have 0.40^-0.25=1.6. Therefore in this case it would require 1.6 

 pounds of nicotin solution for the 96 gallons of dip. Or, if a tobacco 

 extract is used, having for example 2.4 per c«nt of nicotin, the for- 

 mula would be as follows: 0.40-^-0.024=16.66, and therefore 16.66 

 pounds would be required for 96 gallons of dip. Do not use any 



