. Florists' review [microform]. Floriculture. VIE. ' ?? ' '1''^.=," y^j^l^'-^^fiT'^^'^^^v^^-'T-^T^'^^l^rr^.^^r^^ r5?7rT^Wt''3r'rr'^,'5*7v. ?'-TTftT- ?' 120 The Florists^ Review July 13, 1922 labor is to be sacrificed in order to effect a saving in the first cost of a lieating plant. Sometimes, too, it may be feasible to allow the temperature of a greenhouse to drop several degrees below the minimum mentioned, and thus materially reduce the amount of radia- tion required in a greenhouse. However, the amount of radiation suggested is considerably below what should be used, if more than 40 d
. Florists' review [microform]. Floriculture. VIE. ' ?? ' '1''^.=," y^j^l^'-^^fiT'^^'^^^v^^-'T-^T^'^^l^rr^.^^r^^ r5?7rT^Wt''3r'rr'^,'5*7v. ?'-TTftT- ?' 120 The Florists^ Review July 13, 1922 labor is to be sacrificed in order to effect a saving in the first cost of a lieating plant. Sometimes, too, it may be feasible to allow the temperature of a greenhouse to drop several degrees below the minimum mentioned, and thus materially reduce the amount of radia- tion required in a greenhouse. However, the amount of radiation suggested is considerably below what should be used, if more than 40 degrees is to be provided under the most severe conditions, and the use of two 2V^-inch flows is suggested in each house, with eight 1%-inch returns for 50 degrees and ten returns for 60 degrees. The re- turns should be carried as high as pos- sible, and it would be preferable to have the flows on the purlins rather than on the gutters. PIPING NEW HOUSES. I have two greenhouses, 32x50 feet, which I should like to pipe for hot water. I wish to maintain 60 degrees in zero weather. There are four feet of glass in the side walls, while the ends are of glass. It is six feet to the gutter and fourteen feet to the ridge. I thought of using a 5-inch main and two 3-inch flows, together with twelve l^-inch re- turns in each house. Will this piping be sufficient? As the top of my boiler will be level with the ground, will it be ad- visable for me to run the main flow along the ground to the point where the four 3-inch flows connect with it? If I pipe the greenhouses in this man- ner, it will not be necessary for me to run any pipe outdoors. M. B.—O. While it is preferable to carry the flow pipes as high as possible, under the conditions mentioned we would carry a 5-inch main underground, but would have it either level or running slightly uphill and reduce it to 4-inch after tak- ing off the supply pipes for the first house. These may be 3-inch, as planned, but our choice would be to run
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Keywords: ., bookcentury1900, bookdecad, booksubjectfloriculture, bookyear1912
