. 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. Gardening -- Dictionaries; Plants -- North America encyclopedias. Heated ?2. Even-span Houses. ith water in east-iron pipes. the quality of the material used iu the glass, making it more or less opaque, aud iu the number of small knots, causing lenses, which concentrate the sun's ra
. 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. Gardening -- Dictionaries; Plants -- North America encyclopedias. Heated ?2. Even-span Houses. ith water in east-iron pipes. the quality of the material used iu the glass, making it more or less opaque, aud iu the number of small knots, causing lenses, which concentrate the sun's rays md burn the foliage of the plants. This last defect in the glass cannot be wholly guarded against, as the product of a factory does not always run the same, so that any favor- ite brand cannot be fully relied upon in this respect. The lenses which burn will be found in all the dif- ferent grades of glass, firsts, seconds and thirds, with little, if any difference, the grading being done chiefly for other defects, such as affect the value of the glass for window purposes. For these reasons, in selecting the glass for a Greenhouse, it requires experience to decide what make of glass it will be best to purchase. It will be well to purciiase from some one who makes a specialty of furnishing glass for Greenhouses, or call in the aid of some friend who has had experience in build- ing, and can give intelligent advice. The second quality of glass is usually selected for the best Greenhouse work. The standard widths are from 12 to 16 inches, and lengths vary from 16 to 24 inches. A favorite size is 16 by 24 inches. This is about as large as it is practical to use double thick glass, and makes a roof with comparatively few laps. It is not safe to purchase fourth quality of glass or the so-called "Greenhouse glass" frequently offered by window glass dealers, as both of the grades contain the culls and lights only fit to glaze cheap sash for market gardeners, and is of doubtf
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyo, bookyear1906
