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Regulation 33. The dips now approved are : 



(a) The tobacco-and-sulpbur dip, made with suf- 

 ficient extract of tobacco or nicotine solution to give 

 a mixture containing not less than five one-hun- 

 dredtlis of 1 i>er cent of nicotine and 2 per cent 

 flowers of sulithur : Provided, That for the first dip- 

 ping of infected sheep, in lieu of the suli)hur herein 

 prescribed, a sufficient additional amount of extract 

 of tobacco or nicotine solution shall be used to give 

 a mixture containing not less than seven one-hun- 

 dredths of 1 per cent of nicotine. 



(6) The lime-and-sulphur dip, made by mixing 8 

 pounds of unslaked lime and 24 pounds of flowers of 

 sulphur and boiling with 30 gallons of water for not 

 less than two hours. All sediment should be allowed 

 to subside before the liquid is placed in the dipping 

 vat. This liquid should be diluted sufficiently to 

 make 100 gallons before use; 



And pending further investigation, the following- 

 described dips : 



(c) The cresol dip, which consists of a mixture of 

 cresylic acid « with soap. When diluted ready for 

 use this dip should contain one-half of 1 per cent of 

 cresylic acid. 



(d) The coal-tar creosote dip, which is made by 

 mixing coal-tar creosote or coal-tar oils and cresylic 

 acid separately with resin soap in varying propor- 

 tions. This dip should contain when diluted ready for 

 use not less than 1 per cent by weight of coal-tar 

 oils and cresylic acid. In no case should the diluted 

 dip contain more than four-tenths of 1 per cent nor 

 less than one-tenth of 1 per cent of cresylic acid ; 

 but when the proportion of cresylic acid falls below 

 two-tenths of 1 per cent the coal-tar oils should be 

 increased sufficiently to bring the total of the tar 

 oils and the cresylic acid in the diluted dip up to 1.2 

 per cent by weight. 



The cresol dip and the coal-tar creosote dip should 

 alwavs be tested on a small scale with the water and 



« By the term cresylic acid as used in tliese rej?ulations is 

 meant cresols and other phenols derived from coal tar, none 

 of which boils below 185° C. nor above 250° C. 



