. Cyclopedia of American horticulture : comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening; Horticulture; Horticulture; Horticulture. GREENHOUSE When all of the pipes are under the benches or upon the walls, a single large pipe may be used as a flow to supply all of the others in thf roil, or two or more of the pipes of the same sizi-. as tlic returns may be used as flow pipes. These pipis ran s
. Cyclopedia of American horticulture : comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening; Horticulture; Horticulture; Horticulture. GREENHOUSE When all of the pipes are under the benches or upon the walls, a single large pipe may be used as a flow to supply all of the others in thf roil, or two or more of the pipes of the same sizi-. as tlic returns may be used as flow pipes. These pipis ran arranged that they will each supply ono nv mure n lurns. or they may con- nect with a header frcmi wliirli all of the return pipes start. Care Im- laKiii to give all of the return pipes a sliirlit fall, ami ii will be best if this is only enough to iii-mi- tin ii- Im in- kept free from air. It will be safest tu ^i\ n tin- sinallrt- pipes a slope of one inch in 15 feet, but2-ini'h pipes, if carefully graded and securely supported at intervals of 10 feet, will give good results if the fall is not more than 1 inch in 30 feet. This is often of considerable importance in long houses where it is not possible to sink the heater so as to give the returns a fall of 1 inch in 10 or 15 feet, as is often recom- mended. It should be understood that better circulation can be secured when a return pipe has but a slight slope if sufBcient to keep it free from air, with a vertical drop of the return pipe at the lower end, than when the coil has a much greater fall in running from one end of the house to the other, if this brings the lower end of the coil down to about the level of the main return. The circulation in a coil fed by an under-bench flow will be quite unsatisfactory when the lower end of the coil is below the top of the heater, if it is connected at its own level with the return pipes from other coils, that are considerably higher, and especially if they are fed by elev
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Keywords: ., bookcentury1900, bookdecade1900, booksubjec, booksubjectgardening
