Fifth report of the United States Entomological Commission, being a revised and enlarged edition of Bulletin no7, on insects injurious to forest and shade trees . s snugly tothe inner surface of the outer cylinder. The pipe, c, is of rubber hose andmade of any length desired to suit the depth of cask or tank and witha fine wire strainer on the bottom. The head of the pump is of cast ironand bulged to allow room for a considerable head of water; iron flangesextend out from its lower part and furnish support by which if is boltedto the tank. All of the working parts are brass. The packing burr a
Fifth report of the United States Entomological Commission, being a revised and enlarged edition of Bulletin no7, on insects injurious to forest and shade trees . s snugly tothe inner surface of the outer cylinder. The pipe, c, is of rubber hose andmade of any length desired to suit the depth of cask or tank and witha fine wire strainer on the bottom. The head of the pump is of cast ironand bulged to allow room for a considerable head of water; iron flangesextend out from its lower part and furnish support by which if is boltedto the tank. All of the working parts are brass. The packing burr andfollower around the upper end of the piston cylinder are the same styleas ordinarily used with steam machinery so as to withstand any reason-able pressure. The head to which is attached the compensating barscrews into the top of the piston cylinder. The outlet is tapped throughthe bulged cast-iron head, and the pressure is much better if a good-sized air chamber is attached to the discharge pipe just outside of thepump head. The pump from which Fig. 7 was made has two discharge pipes, andone man easily supplies pressure for two ordinary streams of Fig. 8.—Sin{;le-discharge pump. Fig. 8 shows a similar pump entire, fitted with a single discharge pipe. 42 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION.
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