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158 



The Rorijsts^ Review 



Dbcbhbeb 11, 1919. 



GreenhoBse Heating 



BuBSOBiBEBS are invited to write the 

 editor of this department with regard to 

 any details of greenhouse heating that 

 are not understood. When information 

 is desired regarding the capacity of boil- 

 ers, or the amount of radiation required 

 for a greenhouse, the needed temperatures 

 should be stated in the inquiry, as well 

 as tlLd amount of glass in the side walls, 

 and the dimensions and general arrange- 

 ment of the greenhouses. It is often help- 

 ful also to have a sketch showing the 

 location of the houses. 



OIL BXJBNEBS. 



Please furnish us with data on oil 

 burners and oil as fuel for our boilers. 



C. B. C— Pa. 



When either fuel oil or kerosene is 

 used for heating purposes, it is neces- 

 sary to vaporize the liquid and mix it 

 with air before it is burned. In the case 

 of la^ge boilers it is customary to use 

 either steam or compressed air for va- 

 porizing the oil, but in heating and cook 

 stoves and for the smaller forms of boil- 

 ers and furnaces, the oil is heated and 

 vaporized in the burner itself. On leav- 

 ing the btirner it is mixed with hot air 

 from the air drum. 



The comparative heat obtained from 

 oil and from coal depends upon the grade 

 of each fuel used; in general, it has 

 been found that from sixty to 100 gal- 

 lons of oil are required to equal a ton of 

 hard coal. The use of oil for heating 

 purposes has come into quite general use 

 on the Pacific coast, where the oil seems 

 to be especially adapted for the purpose 

 and where its cost is low, while good 

 coal is especially high in price. While 

 on the side of oil as fuel may be put 

 forward the expense of firing, removing 

 ashes, etc., when coal is used, the man 

 who would burn oil must have a large 

 storage tank and a tank wagon for 

 hauling the oil, and must procure and 

 install a special burner for the oil. 



Geo. W. Fisher, 47 Eandolph avenue, 

 Poughkeepsie, N. Y., manufactures the 

 Begal burner for either kerosene or fuel 

 oil. It is especially adapted for stoves 

 and small boilers. The S. T. Johnson 

 Oil Burner Co., 1337 Mission street, 

 San Francisco, Cal., and the Eotary Oil 

 Burner Co., 159 Twelfth street, Oak- 

 land, Cal., are among the other firms 

 which sell oil burners. 



PIPING DAHIilA HOUSE. 



Please tell me how to pipe a green- 

 house, running the pipes under the 

 benches, so as to keep a temperature of 

 60 degrees when it is zero weather out- 

 side. The house will be exposed on all 

 sides and will be used for the propaga- 

 tion of dahlias. It will be 16 x 40 feet, 

 with three feet of concrete and two feet 

 of glass in the sides, three feet of con- 

 crete in one end and the balance glass, 

 and a height to the ridge of ten feet. 

 The house is to run from east to \^est. 

 Steam heat is to be used. 



G. W.— N. 



Although the house described cgm be 

 heated to 60 degrees by using 160 gquare 

 feet of steam radiation, it would be 

 advisable to install a boiler with a 

 rating at least fifty per cent greater 

 than this; if another house is likely to 



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