Archive image from page 114 of Cyclopedia of American horticulture, comprising. 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, and a synopsis of the vegetable kingdom cyclopediaofamer03bail Year: 1906 GREENHOUSE GREENHOUSK 693 When all of the pipes are under the benches or upon the walls, a single large pipf niay be used as a flow to supply all of the others in the coi
Archive image from page 114 of Cyclopedia of American horticulture, comprising. 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, and a synopsis of the vegetable kingdom cyclopediaofamer03bail Year: 1906 GREENHOUSE GREENHOUSK 693 When all of the pipes are under the benches or upon the walls, a single large pipf niay be used as a flow to supply all of the others in the coil, or two or more of the pipes of the same size, as the returns may be used as flow pipes. These pipes can be so arranged that they will each supply one or more retiirns, or they may con- nect with a header from which all of the return pipes start. Care should be taken to give all of the return pipes a slight fall, and it will be best if this is only enough to insure their being kept free from air. It will be safest to give the smaller pipes a slope of one inch in 15 feet, but 2-inch 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 sufficient 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 lu-ater, if it is connected at its own level with the ntur
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Keywords: 1900, 1906, americana, archive, bailey_l_h_liberty_hyde_1858_1954_ed, blc, book, bookauthor, bookcentury, bookcollection, bookcontributor, bookdecade, bookpublisher, booksubject, bookyear, drawing, gardening_dictionaries, historical, history, illustration, image, miller_wilhelm_1869_joint_ed, new_york_doubleday_page_company, page, picture, plants_north_america_encyclopedias, print, reference, umass_amherst_libraries, vintage
