80 



The Weekly Florists^ Review* 



OCTOBKU 27, 1910. 



TAYL OR SPRINGS COAL 



THE COAL or MERIT 



Non-Cl2nkering» Sootless and Free Burning 



CANTINE 

 Washed or Unwashed 



Mine { — Taylor Springs, III. 

 ** 2 — Cantine, III* 



BLACK BRIER 

 Carterville Coal 



Mine 3 — Cantine, III. 

 " 4— Johnston City, in. 



THB WISS FLORIST WILL ORDKR NOW. Writ* or Wire today for Prices F. O. B. your eity. 



Montgomery County Coal Co., Chicago 



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Greenhouse Heating. 



Lest you forget we say it yet, coal's 

 going to be scarce this winter. 



COMPUTING THE HORSE-POWER. 



On what basis is a horse-power com- 

 puted in a tubular boiler? How many 

 horse-power would be needed in a tubu- 

 lar boiler to heat 25,000 square feet of 

 glass to 60 degrees in zero weather? 

 Or, in other words, how many square 

 feet of glass should each horse-power 

 care for at zero, with the house at 60 

 degrees? We are located in southeast- 

 ern Pennsylvania. F. & R. 



The horse-power of a boiler is gen- 

 erally based upon either the area of 

 the grate or of the exposed fire surface 

 of the tubes and shell. One foot of 

 grate area is generally figured as fur- 

 nishing three horse-power in small and 

 medium sized boilers, while twelve to 

 fifteen square feet of heating surface 

 is computed as giving one horse-power. 



When a temperature of 60 degrees is 

 desired, there should be one foot of 

 radiating surface to six feet of glass 

 and one hoTse-power will generally heat 

 100 square feet of radiating surface 

 in the larger plants, but it is best to 

 furnish a horse-power for every 60 to 

 80 square feet in the smaller plants, in 

 accordance with the minimum outside 

 temperature as well as the exposure and 

 construction of the houses. 



THE BOILER ABOVE GROUND. 



I should like to get some information 

 in regard to heating our greenhouses. 

 We have five houses, each 14x120 feet, 

 running north and south. They measure 

 six feet to the gutters and from ten to 

 eleven feet to the ridge. We shall use 

 hot water. The boiler house is at the 

 north end. 



We can not put our boiler in a pit, 

 as we should then be troubled with wa- 

 ter. Our plan is this: With the boiler 

 on the level, connect an ell to the boil- 

 er; run a short piece of 5-inch pipe 

 straight down and then to the main, 

 running east and west; run our 4-inch 



HARRISBURG-rRANKLIN COAL CO. 



1216 FISHER BLDG., CHICAGO 



The Better Grades ONLY of 



INDIANA AND ILLINOIS COALS 



Preparation and Quality aa they should be. Write to-day for Prices 



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SMITH, LINEAWEAVER & CO. 



COAL 



AatbrMlte, BltnmlDoat, Coke and Qu Goal 



TTuTt'SySSto,. Philadelphia 



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flows from this, under the benches. 

 Would this plan work, or what would 

 you suggest? We expected to use four 

 4-inch pipes in the rose house and three 

 4-inch pipes in the carnation houses. 

 Would that be enough, in our Michigan 

 climate? P. L. 



If the plan proposed is used, the cir- 

 culation will be extremely slow and 

 little heat will be secured. When the 

 boiler stands higher than the returns, 

 it is better to use smaller pipe, so that 

 the flows can be carried overhead. For 

 the rose houses use three 2%-inch flow 

 pipes and six 2-inch returns. For car- 

 nations use two flows and six returns, 

 keeping both flows and returns as high 

 as possible. 



STEAM FOR ELL-SHAPED HOUSE. 



May I ask you how to pipe my house 

 for steam? I have a thirty horse-power 

 return flue boiler. My main house is 

 14x60, with an addition or wing 12x36, 

 in the form of an ell. The boiler will 

 be situated in the basement of a barn, 

 which is attached to the ell of the 

 greenhouse. I was figuring on using 

 two 2-inch flows, running them about 

 two feet from the eaves, to the extreme 

 ends and then down, dividing them into 

 four IV^-inch returns and running two 

 of these back under each of the outside 

 benches. Do you think this will be 



BUY THE 



Taylor Automatic 

 RETURN TRAP 



Jn^'f'-^- 



CleuoulPluf 



AND SAVE MONET 



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 and Best Prices 



TAYLOR STEAM SPECIALTY CO. 



BAHLE CREEK. MICH., U. S. A 



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sufficient, in the climate of northern 

 Illinois? I am growing carnations. The 

 side walls consist of three feet of 

 boards and eighteen inches of glass. 

 The house is nine feet high at the ridge. 



J. E. M. 



As no drawing was enclosed, it is not 

 possible to tell just how the ell is ar- 

 ranged, but if it is at the end of the 

 other house it will be an easy matter 

 to heat the two houses by running two 

 flows, as proposed, along the plates and 

 connecting them with four returns un- 

 der the benches. While it will be ad 

 visable to use four li^-inch returns, 

 there will be no occasion for using two 

 2-inch flows, as with the latter it would 

 be possible to heat the house to 60 de- 



