84 
arsenites is used it is advised that they be purchased in 100-pound 
lots, using- 600 gallons of spraying- solution as a basis. Taking the 
prices of these different compounds as they are in the Far West, the 
following estimates are made: 
Paris green: 
Paris green, 4 pounds, at 25 cents _ |1. 00 
lime, 8 pounds 04 
Total 1. 04 
f^cheele's green: 
Scheele' s green , 4 pounds, at 12 J cents 50 
Lime, 8 pounds 04 
Total 54 
Lime arsenite: 
White arsenic, Ih i:)ounds, at 10 cents 15 
Lime, 8 pounds 015 
Additional lime, 12 pounds 06 
Total 225 
Lime arsenite with soda: 
White arsenic, 1 j pounds, at 10 cents .15 
Salsoda, 6 pounds, at 1 ^ cents 09 
Additional lime, 6 pounds 03 
Total 27 
Lead arsenate: 
Arsenate of soda, 2} pounds, at 10 cents 25 
Acetate of lead, 6 pounds, at 12 cents 
/z 
Total 97 
Prepared lead arsenate, 36 pounds, at 20 cents 7. 20 
From the foregoing quotations, any fruit grower can estimate the 
expense of spraying b}" changing the prices to those prevailing in his 
vicinit}^ The prices of these chemicals, excepting the lime and sal 
soda, are from about 2 to 5 cents per pound more in the West than in 
the East. The labor of preparing, which is but little, is another factor 
which must be included. In the preparation of arsenicals for a home 
orchard or a small commercial orchard it may be advisable for the 
fruit grower to purchase the more easil}^ prepared compounds, such 
as Paris green or prepared lead arsenate, as this does away with much 
trouble and loss of time in preparing the solution. 
Labor is the principal element of cost in actual spraying operations. 
The cost of one spraying for a thousand 8-vear-old trees in the far 
West, using 2^ gallons of lime arsenite and soda compound per tree, 
is estimated as follows: 
