FORTY-SECOND ANNUAL REPORT. 



161 



TESTING AND DILUTING CONCENTRATED LIME-SULPHUR. 



Every "batch" of the home made concentrated lime-sul- 

 phur wash will have to be tested when cooled to determine 

 its strength and it will be well to test the "commercial" 

 brands. This testing is done with a Baume hydrometer. 

 It is a simple instrument used to determine the weight and 

 density of liquids. It is made of glass, is about a foot 

 long, and has a graduated scale on the side. 



It is absolutely necessary that the hydrometer be kept 

 perfectly clean. If the solution is allowed to dry on it an 

 accurate test cannot be made. 



It can be purchased from dealers in druggists supplies 

 or from Bausch and Lomb Optical Company, Rochester, 

 X. Y., Whitall Tatum Company, Philadelphia, Pa., or 

 Taylor Instrument Companies, Rochester, N. Y. 



(See page 169 for the rates of dilutions.) 



AMOUNT OF SULPHUR IN SOLUTION. 



The relation between the "Baume Test" and the sulphur in solution 

 in the commercial or home made concentrated lime-sulphur wash can 

 be determined from the following table. 



Cir. No. 10 Mich. Exp. Station. 

 21 



