516 DISEASES OF CATTLE. 



The dipping bath sliouUl be used ut a temperature of 100° to 105° 

 F., and for odicial 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 1>II'. 



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; flowei-s 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= 1.0. Therefore in this case it would require 1.6 

 pounds of nicotin solution for the 9G gallons of dip. Or, if a tobacco 

 extract is used, having, for example, 2.4 per cent of nicothi, 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 

 preparation the strength of which is not given on the outside of the 

 package. 



Ill prepuriug these dips the nicotin solution and sulphur should 

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

 dipping vat. On no account should the dip be heated above 110° F. 

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

 nicotin and weaken the dip. 



For official dippings the dipping bath should be used at a tem- 

 perature of 100° to 105° F. and at all times must be maintained at 

 a strength of not less than five one-hundredths of 1 per cent nico- 

 tin as indicated by a field test approved by the Bureau of Animal 

 Industry. 



A homemade nicotin dip may be prepared as follows: 



For each 100 gallons of dip desired, take 21 pounds of good, pre- 

 pared tobacco leaves; soak the leaves in cold or lukewarm water 

 for 24 hours in a covered pot or kettle; then bring the water to near 

 the boiling point for a moment, and, if in the morning, allow the 

 infusion to draw for an hour; if in the evening, allow it to draw 

 overnight; the liquid is next strained (pressure being used to extract 

 as much nicotin as possible from the wet leaves) and diluted to 100 

 gallons per 21 pounds of tobacco. This dip should be used as fresh 

 as possible, as it contains a large amount of organic material which 

 will sot)n decompose. 



