. The encyclopedia of practical horticulture; a reference system of commercial horticulture, covering the practical and scientific phases of horticulture, with special reference to fruits and vegetables;. Gardening; Fruit-culture; Vegetable gardening. SPRAYS AND OTHER MEANS OF CONTROL 1887 not give the purchaser the returns de- sired with a minimum of expense for la- bor and repairs. Some machines were never intended by their designers to pump gritty spray so- lutions, oil emulsions, caustic solutions, or acid oils in emulsion form, and con- sequently will not prove satisfactory. The efficienc
. The encyclopedia of practical horticulture; a reference system of commercial horticulture, covering the practical and scientific phases of horticulture, with special reference to fruits and vegetables;. Gardening; Fruit-culture; Vegetable gardening. SPRAYS AND OTHER MEANS OF CONTROL 1887 not give the purchaser the returns de- sired with a minimum of expense for la- bor and repairs. Some machines were never intended by their designers to pump gritty spray so- lutions, oil emulsions, caustic solutions, or acid oils in emulsion form, and con- sequently will not prove satisfactory. The efficiency of a pump depends largely upon the construction of its valves, valve- seats, plunger, cylinder and stuffing box, if built with the last. Air chambers are also very important, hence these subjects will be taken up under separate heads. The body or frame of the pump should be heavy and strong enough to with- stand hard usage and excessive strain. Bearings are often too short, gears too narrow and too light in weight, oil cups are omitted where they are needed, and the frame upon which the machine is mounted is so light that it is warped and buckled at every stroke of the pump. Air chambers are often omitted on small pumps, and some large machines are equipped with very small ones. A barrel pump is greatly improved by the addition of an air chamber five or six inces in diameter and about two feet long. Intake and hose supply-pipes must be from a point near the bottom of the cham- ber, or the value of the resilient column of air is lost. The value of an air chamber lies in the even pressure obtained, in the taking away of the heavy shock upon valves, and of the sudden strain often put on other parts of a pump. A good air chamber also eases the labor of the man at the handle of the pump or of the engine which is furnishing the power. The liquid in the air chamber is often unagitated unless some provision in de- sign has been made so that the opening of a nozzle cut-off agitates th
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Keywords: ., bookcentury1900, booksubjectfruitculture, booksubjectgardening
