82 FUMIGATION METHODS 
estimated. By taking half the difference and adding 
it to the contents of the cylinder the estimation was 
found approximately correct. 
CHEMICALS ESTIMATED FOR EASTERN ORCHARDS 
HIGHT OF : eS . 
TREE Diameter Cyanide Acid Water 
Feet Feet Grammes Ounces Ounces 
4 3 6.17 0.32 0.48 
5 4 12.82 0.67 1.00 
6 4 18.85 1.00 1.50 
7 4 26.7 1.41 2.11 
Ounces 
7 5 1.11 1.66 2.49 
8 4 1.30 1.95 2.92 
8 5 1.50 2.25 3.39 
9 5 1.96 2.94 4.41 
9 6 2.24 3.36 5.00 
10 a 3.20 4.80 7.20 
10 8 3.62 5.43 8.14 
11 i 3.95 5.92 8.88 
11 8 4.40 6.60 9.90 
12 9 5.88 8.82 13.23 
12 10 6.51 9.76 14.64 
13 9 6.93 10.39 15.58 
13 10 7.65 11.47 17.20 
14 11 9.76 14.64 21.96 
14 12 10.65 15.97 23.45 
15 11 13.28 19.42 29.88 
15 12 14.24 21.36 32.04 
16 14 16.34 24.51 36.76 
16 15 17.53 26.27 39.43 
17 14 18.39 27.57 41.35 
17 15 19.36 29.40 44.23 
18 15 22.06 83.09 49.63 
19 16 26.10 39.15 58.72 
20 16 29.00 43.50 65.25 
A careful study of the tables made by various indi- 
viduals for orchard work is interesting. The present 
practice in California does not vary much in amount 
of cyanide used per cubic foot from that originally 
estimated by Coquillett and Morse. The results as. 
summed up by Woodworth are given in the following 
table. 
