. Injurious insects : how to recognize and control them . Insect pests; Insect pests. LARGE HAND PUMPS 95 Horizontal Pumps Horizontal hand pumps are typically of the double-action U^ie, and have a capacity of 3 to 5 gallons of spray material per minute. They ha\-e a marked ad\-antage o\-er barrel pumps in that the handle is longer. Fig. 61. —A oou\'onieut tower used iu conueetiou with a barrel pump. Original. and \Yorks in such position that the operator can maintain the desired pressm-e and ^'olume with much less effort. They do not bring the constant strain on the muscles of the back, charac
. Injurious insects : how to recognize and control them . Insect pests; Insect pests. LARGE HAND PUMPS 95 Horizontal Pumps Horizontal hand pumps are typically of the double-action U^ie, and have a capacity of 3 to 5 gallons of spray material per minute. They ha\-e a marked ad\-antage o\-er barrel pumps in that the handle is longer. Fig. 61. —A oou\'onieut tower used iu conueetiou with a barrel pump. Original. and \Yorks in such position that the operator can maintain the desired pressm-e and ^'olume with much less effort. They do not bring the constant strain on the muscles of the back, characteristic of l^arrel pumps, and since they are double acting, both the forward and the reverse strokes count. In efficiency, pumps of this t>-pe are nearly the equivalent of the smaller power Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original O'Kane, Walter Collins, b. 1877. New York : The Macmillan Company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsectp, bookyear1912
