388 MAINE AGRICULTURAL EXPERIMENT STATION. I9IO.. 



TABLE FOR DILUTION OF CONCENTRATED STOCK SOLUTIONS OF 

 VARYING DENSITIES. 



Stock Solution Winter Strength Summer Strength 



Baume Scale Leaves Off. Leaves On. 



Reading. Dilution. Dilution. 



32° 1-12 1-30 



V 31° i-ii 1-29 



30° i-io 1-28 



29° i-gYz 1-27 



28° 1-9 1-26 



27° 1-8K 1-25 



26° 1-8 1-24 



25° . 1-7^ 1-23 



24° 1-7 1-22 



2;^° i-6y2 1-2 1 



22° 1-6 1-20 



Not counting the initial cost of the apparatus it is estimated 

 that at the prevailing price of labor and materials home-made, 

 concentrated lime-sulphur can be prepared for from $3.00 to 

 $3.50 per barrel of 50 gallons. If the fact that 50 gallons of 

 concentrated material will when diluted for summer use make 

 from 1300 to 1500 gallons of spray, is remembered, it will be 

 seen that home-cooked lime-sulphur is considerably less expen- 

 sive than bordeaux mixture. 



Commercial concentrated lime-sulphur. During the past two 

 years several firms have placed on the market different brands 

 of concentrated lime-sulphur similar to the home-boiled article. 

 Quite a number of these have been tested experimentally and 

 as a rule these have given quite favorable results when com- 

 pared with the latter. While directions may be furnished with 

 the commercial brands, they should always be tested with the 

 hydrometer and the dilutions made on this basis, using the 

 table given above. 



"Variations in the degree of concentration of the commercial 

 lime-sulphur mixtures may occur with different barrels of the 

 same brand. Some companies compounding these sprays have 

 apparently not been able to produce a wash of definite strength 

 or have failed to realize the importance of maintaining a uni- 

 form grade for their product."* 



* Parrot, P. J., N. Y. Exp. Sta., Bui. 320, p. 423, 1909. 



