. The care of trees in lawn, street and park. With a list of trees and shrubs for decorative use. Trees; Trees. 140 Control of Parasites ous forms which such apparatus might take. A full dis- cussion may be found in the Yearbook of the United States Department of Agricukure for 1896, and in other publica- tions, notably of the State Entomologists, various combina- tions are proposed.^ Since the spray mixtures are very corrosive, the apparatus should be thoroughly cleaned immediately after use by forcing pure water through it and wiping off the exposed parts. Failures in results from spraying c
. The care of trees in lawn, street and park. With a list of trees and shrubs for decorative use. Trees; Trees. 140 Control of Parasites ous forms which such apparatus might take. A full dis- cussion may be found in the Yearbook of the United States Department of Agricukure for 1896, and in other publica- tions, notably of the State Entomologists, various combina- tions are proposed.^ Since the spray mixtures are very corrosive, the apparatus should be thoroughly cleaned immediately after use by forcing pure water through it and wiping off the exposed parts. Failures in results from spraying come either from unsatisfactory ap- paratus, such as lack of an agitator on the pump, poor nozzles throwing a shower, instead of a mist, insufR- FiG. 54.— "Gem" nozzle dent and variable pressure, or else unsatisfactory application, lack of thoroughness, failure to choose the right time or weather (wind and rain), and use of wrong materials, or improperly mixed ones. As to the cost of spraying, the Entomologist of the Depart- ment of Agriculture estimates that, after a proper apparatus is installed, for a city like Brooklyn, N. Y,, an expenditure of $4,000 to $5,000 would result in green shade trees all through the summer, and this expenditure would probably not need to be continued annually. The cost must neces- sarily vary according to the number and size of trees to be treated and to other circumstances, reported experiences ' Reliable dealers in spraying machinery are: Gould Manufacturing Co., Seneca Falls, N. Y.; Field Force Pump Co., Elmira, N. Y.; Sydnor Pump and Well Co., Richmond, Va.; Morrell & Morley, Benton Harbor, Mich.; Darning Co., Salem, Ohio; E. C. Brown Co., Rochester, N. Y.; Spraymotor Co., Buffalo, N. Y., and London, Canada; Rochester Spray Pump Co., Rochester, N. Y.; Friend Mfg. Co., Gasport, N. Y.; Hardie Spray Pump Mfg. Co., Detroit, Mich.; \Vm. Stahl, Quincy, Please note that these images are extracted from scanned page images that ma
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