. Annual report of the New York State College of Agriculture at Cornell University and the Agricultural Experiment Station. New York State College of Agriculture; Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). Hotbed Construction and Management 1623 the sand. With square shovels this dry mixture is turned twice. Then water is added, care being taken that none of the water runs off as in doing so it carries away fine particles of cement. As the water is added the mixture is turned again, and when more water is needed it is applied. The turning is continued
. Annual report of the New York State College of Agriculture at Cornell University and the Agricultural Experiment Station. New York State College of Agriculture; Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). Hotbed Construction and Management 1623 the sand. With square shovels this dry mixture is turned twice. Then water is added, care being taken that none of the water runs off as in doing so it carries away fine particles of cement. As the water is added the mixture is turned again, and when more water is needed it is applied. The turning is continued until the whole mass is thoroughly wet and slightly sloppy. At this stage it is shoveled into the form, and tamped down with a blunt 2x3-inch scantling in order that all parts of the form may be filled solid. It is quite important, in filling, that the whole form be filled alike on all sides; then, if it cannot be filled in one day, the top can be moistened with water just before the first batch of concrete is put in the following morning, thus making sure the union between the work of the two Fig. 17.—Commercial hotbeds. A cheaply constructed mat of lath and straw in the middle of the bed When the form is completely filled and the concrete is leveled slightlyhigher than the woodwork of the form, short pieces of boards are laid over the top, but not touching the concrete, for protection against rain. In two or three days the form may be carefully removed and the sides of the concrete ex- posed directly to the weather. Care must be taken, however, that the con- crete does not dry out too fast, or it will crack and sometimes heave. A few pails of water thrown on will stop this quick drying; or, on very sunny days, boards or lath screens covering the bed will serve the purpose. A 2X4-inch sill set in the cement and fastened by the bolts, lapping at the corners, is then placed on the bed and is to serve as a rest for the sashes. Crosspieces, such as are spoken of for the
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