556 



THE MONTHLY BULLETIN. 



your whole plant is nothing as compared with the bother of a carload of 

 containers. 



Fig. 113. — Filling a barrel for field use. (Original.) 



The cost of the finished concentrate can best be given in the results of 

 one day 's run : 



MATERIAL USED IN ONE DAY'S RUN OF THIRTY-FIVE BATCHES. 



2800 pounds Cal. powdered sulphur at 2 cents $5G 00 



150O pounds lime — lOO pounds waste — at 1 cent 15 00 • 



Labor, 3 men, 11 hours at 25 cents 8 25 



Total cost of 35 batches, making 1200 gallons solution $79 25 



In a day's run of thirty-five batches 1400 gallons would be turned 

 out, theoretically, but the loss in boiling amounts to about two gallons' 

 per batch, and the amount lost in sludge may bring the total amount of 

 finished material turned out down to 1200 gallons. This makes the net 

 cost of the solution 6.6 cents per gallon. In order to be on the safe side 

 and allow for incidental expenses the material is charged to the orchards 

 at 7 cents per gallon. 



In comparing the cost of this material with that of any commercial 

 spray one miLst make the comparison on the basis of equivalent 

 strengths. This is obtained by measuring the density of the liquid in 

 terms of specific gravity or by the Baume scale. The latter is more 

 frequently used in lime-sulphur solutions. A hydrometer with a Baume 

 scale ranging from 10 to 40 degrees — price 50 cents to $1.50 — will 

 give a reliable test of material.* 



*See Injurious and Beneficial Insects of California, State Coram. Hort., p. 467. 



