. Greenhouse construction and heating: containing full descriptions of the various kinds of greenhouses, stove houses, forcing houses, pits and frames, with directions for their construction, and also descriptions of the different types of boilers, pipes, and heating apparatus generally, with instructions for fixing the same. Greenhouses. 120 GREENHOUSE CONSTEUCTION AND HEATING. the bed. But many growers prefer to use loose sheets of glass, laid between lengths of light sash bar, tacked in place temporarily or otherwise, from front to back of the bed. These admit more light than sashes ; air c
. Greenhouse construction and heating: containing full descriptions of the various kinds of greenhouses, stove houses, forcing houses, pits and frames, with directions for their construction, and also descriptions of the different types of boilers, pipes, and heating apparatus generally, with instructions for fixing the same. Greenhouses. 120 GREENHOUSE CONSTEUCTION AND HEATING. the bed. But many growers prefer to use loose sheets of glass, laid between lengths of light sash bar, tacked in place temporarily or otherwise, from front to back of the bed. These admit more light than sashes ; air can be given to any extent, and the whole, bars and all, can be easily removed when necessary. Double, or two-light, frames are usually constructed without any division, the inner edges of the lights being carried on a flat bearing bar, about 3in. by l^in. strengthened by a " parting piece " of 2in. by fin. stuff, nailed on edge along the middle of the former, to separate the lights. This bar is dovetailed into and nailed to the "box" or boards forming the front and back, and thus serves the additional purpose of holding the latter firmly in place. Pit-lights are supported in the same manner, and a division may of course â be placed where necessary, and may consist of either brick or boards. Movable wooden divisions are very useful in long ranges of pits. Handlights and Plant-Protectors. â The old- fashioned handlight, made with small pieces of glass set in a framework of lead or iron, and which is illustrated in Fig. 76, was largely employed for protecting early cauliflowers, lettuces, vegetable marrows, etc., and for raising small seeds. They are still employed to some extent, but have been in a great measure displaced by pits and frames of the ordinary type. Some handlights are, or were, made with movable tops, and some without, but where a considerable number are required, as to cover any extent. Please note that these images are extracted from scanned
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectgreenho, bookyear1901
