432 



AGRICULTURE OF MAINE. 



liquid may test higher or lower than this, varying with the con- 

 centration, so it should always be tested. The liquid should not 

 be tested ivhile hot hut should he cooled to ahout 60° F. The 

 reading on the hydrometer should be taken at the general sur- 

 face of the liquid at which it is supported. 



If the concentrate is not intended for immediate dilution it 

 should be at once stored in tightly closed containers till ready 

 for use. The amount of dilution will, of course, depend upon 

 the density of the concentrate. The following table supplied 

 by Cordley gives the amount of dilution of concentrated lime- 

 sulphur stock solutions of different degrees of density accord- 

 ing to the Baume scale for winter and summer spraying of apple 

 trees. Only the dilutions indicated in the right-hand column 

 should be used for trees in leaf. 



TABLE FOR DILUTION OE CONCENTRATED STOCK SOLUTIONS OE 



VARYING DENSITIES. 



Stock Solution 

 Baume Scale 

 Reading. 

 32° 

 31° 

 30° 

 29° 

 28° 

 27° 

 26° 



25° 

 24° 



23° 

 22° 



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. 



