SHEEP SCAB. 25 



enough lime-and-siilphur paste should be cooked at one time to dip 

 the flock. The quantity of mixture in the cooking tank may be 

 A-aried at will, but the proportions of the various ingredients should 

 not be altered. 



THE NICOTIN-AND-SULPHUR DIP. 



The nicotin-and-sulphur dip is made with sufficient nicotin solu- 

 tion and flowers of sulphur to give a mixture containing not less than 

 five one-hundredths of 1 per cent (0.05 per cent) nicotin and 2 per cent 

 sulphur. Sufficient nicotin for 96 gallons (about 800 pounds) of dip 

 would therefore be furnished 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 90 gallons. 



To calculate hoAv much nicotin solution should be used for 96 

 gallons of water, divide the quantity of nicotin required in the 

 dip by the proportion of nicotin in the product. For example, sup- 

 pose 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. Xo preparation the 

 strength of which is not given on the outside of the package should 

 be used. 



In preparing these dips the nicotin solution and sulphur should be 

 mixed together with water before adding them to the water in the 

 dipping vat. The dip should on no account be heated above 110° F. 

 after the nicotin solution is added, as heat is liable to evaporate 

 the nicotin and Aveaken the dip. 



DETERMINING CAPACITIES. 



One of the first steps in opening a dipping plant is to ascertain 

 the capacity of the vat and the various tanks. The capacity of the 

 vat is usually obtained in the following manner: In 1 gallon there 

 are 231 cubic inches; multiply the average length by the average 

 Avidth in inches, then the product by the depth ; this will give approxi- 

 mately the number of cubic inches of space to be filled Avith dip. 

 Divide this by 231 and the result will be approximately the number 

 of gallons of dip required to charge the vat. 



To obtain the average length, add the length at the bottom to the 

 length at the top (that is, at the line to which the vat is to be filled) 

 and divide this sum by 2. Obtain the average Avidth in the same 

 manner. The depth should be taken at the center of the vat, and 

 should be from bottom to dip line only and not to the top of vat. 

 LikeAvise in determining the length and width measure only the space 

 to be filled Avith liquid and not above that line. The capacities of 



