. Les fleuristes [microforme] examen. La floriculture. 100 l'Hebdomadaire Florists' examen. Apbil 18, 1912. Greenhonse Chauffage. L'EAU DANS L'BOILES FOSSE. Serez-vous assez aimable pour nous aider à sortir de notre problème, qui est de l'eau dans la chaudière ? La question de l'âge- vidange a été examiné, mais il y a une trop grande distance à parcourir pour obtenir une chute, alors nous devons élever le niveau de la chaudière à l'effet de serre. Les murs latéraux sont trois pieds et demi de haut, la panne colonnes cinq pieds de haut et la crête de 9 pieds de haut. La chaudière murale est de six pieds de la base ; entrée de la chaudière est un et demi de pieds de la bas

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. Florists' review [microform]. Floriculture. 100 The Weekly Florists' Review. Apbil 18, 1912. Greenhonse Heating. WATER IN THE BOILES PIT. Will you be kind enough to help us out of our trouble, which is water in the boiler pit? The question of drain- age has been considered, but there is too great a distance to go to obtain a fall, so we must raise the boiler to the greenhouse level. The side walls are three and one-half feet high, the purlin columns five feet high and the ridge nine feet high. The boiler outlet is six feet from the base; the boiler inlet is one and one-half feet from the base. We have a hot water heating system, with an enclosed tank. The pipe in use is 2-inch for the risers and l^^-inch for the returns. g" F. B. While it is always desirable so to locate the heater that it will be below the level of the coils, it will give a good circulation even though it stands on the same level as the greenhouse floor. Had the length and breadth of the greenhouse been given, it would not be diflScult to give directions for pip- ing the house, but as no data along this line have been furnished, it is not pos- sible to give any really definite advice. All that can be done is to run two or three mains at as high a level as pos- sible and connect them at the farther end of the house with the return pipes. ON THE PACIFIC COAST. I am sending you a sketch of my greenhouses, each 22x135 feet and twelve feet to the ridge. They will run east and west. I should like to know how many square feet of radi- ation will be required to maintain tem- peratures of 60 and 50 degrees, when the outside temperature is 12 degrees. I will use hot water and will have the piping under the benches. H. N. The sketch shows two houses, each 22x135 feet, with one wall in common and with the north wall of one house of solid boards, five feet high, and the south wall of the other house of the same height, but with the upper half of glass. A boiler with a rating of 2, 400 square feet of radia

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