RECENT WORK WITH HYDROCYANIC ACID GAS 2II 
ALLEN’S FUMIGATION TABLE FOR NEW SOUTH WALES 
ORCHARDS.—Continued 
SN z x 
x SS % AY Ray % 
Salle | oc S| OR s Sales. 5 ae Wlecs x 
ES = Ss 2 S x SS 2 8 = = x 
38 a a 8 ys S 3 do as 8 SE 8 
Ss ~ 8 = NS x ~ IS > N 
Q} x 6) O | wy = Q} x S) Oo} 4 
Oz Oz. Oz. Oz. OZ Oz 
23| 15 | 5,357 | 2646 | 261 | 7 93 | 94 | 8.571 | 4216 | 4216 | 127 
23 | 16| 5,714 | 2816 | 2816 | 85 23 | 25 | 8,928 | 4446 | 4449 | 133 
23| 17] 6,071 30 90 || 283] 26] 9,285 | 46 | 46 | 138 
As a final caution, Mr. Allen says the full height 
and width of the tree should be taken after the tent is 
in place. Give a full charge of chemicals; it is better 
to give a fraction of an ounce too much than too little. 
Especial attention is called to Fig. 76, reproduced from 
Mr. Allen’s report. For full directions for making 
and applying the gas, see Chapters II. and V. to X., 
inclusive. 
Orchard work in Cape Colony, South Africa.—The 
fumigation of orchards in Cape Colony is largely due 
to the work of Prof. Charles P. Lounsbury, the Gov- 
ernment Entomologist. The methods followed are 
very similar to those used in California. The condi- 
tions, however, governing the citrus industry of 
southern California are somewhat different from 
those found in Cape Colony. In California the black 
scale is one of the principal pests against which fumi- 
gation is conducted. This insect is practically un- 
known to the colonial fruit growers, and where it does 
exist it is kept in check by natural enemies. In point 
