Economic entomology for the farmer Economic entomology for the economicentomolo00smit_0 Year: 1896 INSECTICIDES, PREVENTIVES, AND MACHINERY. 463 tions in the act of spraying. At the present writing this machine is not sufficiently perfected to warrant me in recommending it, but no doubt practical machines will be constructed, in the near future, carrying kerosene in one tank and water in another, with a pump so arranged that the materials will combine in a mechani- cal mixture that can be satisfactorily applied to plants. Fig. 479- An ' emulsion' knapsack sprayer for combining ker
Economic entomology for the farmer Economic entomology for the economicentomolo00smit_0 Year: 1896 INSECTICIDES, PREVENTIVES, AND MACHINERY. 463 tions in the act of spraying. At the present writing this machine is not sufficiently perfected to warrant me in recommending it, but no doubt practical machines will be constructed, in the near future, carrying kerosene in one tank and water in another, with a pump so arranged that the materials will combine in a mechani- cal mixture that can be satisfactorily applied to plants. Fig. 479- An ' emulsion' knapsack sprayer for combining kerosene and water. For applying insecticides underground, which is sometimes desirable in using bisulphide of carbon against the cabbage-root- maggot and other subterranean species, there is only one satis- factory piece of machinery,—the McGowen injector. This is best explained by Fig. 481, illustrating its use on cabbages. The fol- lowing directions may be observed, and will at the same time indicate the method in which the machine may be used for other purposes. The method of inserting the injector is shown in Fig. 481. The hole should always begin at a distance of three or four inches
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