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TheWcckly Florists' Review/ 



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Nohtgoinery County Coal Co. 



COAL OF MERIT 



TAYLOR SPRINGS COAL ^^^'hv^i. ,:M'''^^\4>^m-f 



FISHER BUILDING, CHICAGO 



Mention Tbe Review when you write. 



Greenhouse Heating. 



An early winter usually is a bad win- 

 ter. Are you prepared for a car short- 

 age and a fuel famine? 



STEAM FOE THEEE HOUSES. 



I should be pleased to have your ad- 

 vice about piping my greenhouses for 

 flteam heat. I have three houses, each 

 17x100 feet, running north and south. 

 They measure six feet six inches to the 

 gutter and twelve feet to the ridge, 

 with three feet of glass in the side 

 walls and a lean-to on the north end, 

 eight feet wide. The boiler, a No. 278 

 Furman, will be at the north end, above 

 the ground, with a Morehead return 

 trap for returning the water to the 

 boiler. I shall use one main flow of 

 2-inch pipe at the ridge and one 1^- 

 inch pipe at each gutter in each house. 

 How many returns and what size will 

 be needed under the benches of each 

 house, to have a temperature of 54 to 

 60 degrees in zero weather? My loca- 

 tion is eastern Kansas. I would also 

 ask how many of the pipes should be 

 supplied with valves to reduce the heat 

 in moderate weather, as I shall carry 

 from five to eight pounds of steam in 

 the boiler to operate the trap. B. E. 



If the houses are disconnected, so 

 that each has two side walls with three 

 feet of glass, to heat them, to 60 de- 

 gress will require nine 1%-inch return 

 pipes, in addition to the 2-inch flow 

 and the two 114-inch pipes on the 

 plates. There should be valves on six 

 of the nine returns. 



UNSATISFACTORY PIPING. 



I am having trouble with my hot 

 water system and come to you for ad- 

 vice. I have two houses, one 12x35, 

 the other 22x42, and eleven feet high 

 to the ridge. In the smaller house I 

 have one 2-inch flow and one 1^-inch 

 return and had no trouble in keeping 

 it hot last winter. The flow is about 

 eight inches above the top of the boiler. 



The larger house is new and has 3- 

 foot walls, with twelve inches of glass 

 in the southeast side. The house runs 

 from northeast to southwest. I have 

 in it one 2i4-inch flow and two 2-inch 

 returns, extending entirely around the 

 house on the side walls. The flow 

 pipe rises gradually from the boiler to 

 the farther end of the house, and the 

 returns drop about two inches in six- 

 teen feet until within eight feet of the 

 boiler, when they drop about two feet 

 in eight. The opening in the boiler 

 for the returns is 2-inch. In heating, 

 the upper or flow pipes get quite hot, 

 but the returns are barely warm, ex- 

 cept about one-half the way back. 

 Can you tell me whether I have suffi- 

 cient heating power in the ^ one 2y2- 

 inch flow and two, 2-inch returns? 

 What is the reason the returns do not 

 heat? I am located in central West 



SEND FOR 



Free Instruction 





This book tells how to make 

 permanent repairs to boilers, 

 tanks, piping, etc., and how 

 to make greenhouse iron pipe 

 joints, using the well-known 

 Smooth-On iron cements. 

 Every florist should have a 

 copy at once. 



Smooth -On Mfg. Co. 



JERSEY CITY, N. J. 



CHICAGO WAREHOUSE, 8S1 N. Jefferson St. 

 SAN FBANCIBCO WABEHOCSE. 94 Market St. 



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HARRISBIRG-FRANKLIN COAL CO. 



1216 FISHER BLDG., CHICAGO 



Tbe Better Grades OKLY of 



INDIANA AND ILLINOIS COALS 



Preparation and Quality as tbey should be. Write to-day for Prloes 



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Virginia and wish a temperature of 50 

 to 60 degrees at night. I have been 

 thinking of putting one of the returns 

 under the benches. Would this help 

 the heating! H. E. F. 



To heat the house 22x42 feet to 50 

 degrees in zero weather, it would be 

 well to have one 2 1^ -inch flow pipe and 

 ten 2-inch returns. The trouble with 

 the circulation is possibly caused by 

 the fact that the returns are too near 

 the level of the boiler. It would help 

 matters if the flow were carried to as 

 high a point as possible and then given 

 a slight fall through the house. At the 

 farther end, divide the flow and carry 

 the returns as high as possible. 



WATER UNDER PRESSURE. 



Some time ago I asked whether there 

 was any advantage in placing a pres- 

 sure of twenty-five to forty pounds on 

 a hot water heating system that was 

 deficient in radiation. In your answer 

 it was not made plain whether hot 

 water boiled at a higher degree of heat 

 with a pressure of forty pounds than 

 with a pressure of ten pounds. We are 

 told that with each pound of 'pressure 

 the boiling point is raised, while our 



SMITH, LINEAWEAVER & CO. 



COAL 



latferMlt*. BItamlBODS, Coke and Gss Coal 



mSrgJX.. Philadelphia 



Mention The Review when you wriu.-. 



steamfitter says the water will travel no 

 faster and bear no more heat at forty 

 pounds than at ten pounds of pressure. 



J. T. 



The fact that the water is under 

 pressure has nothing to do, of itself, 

 with the rapidity of the circulation, 

 and yet indirectly it may have a 

 marked effect upon the efficiency of a 

 given amount of radiation, so that it 

 may be possible either to carry a higher 

 temperature when the water is under 

 pressure than when an open system is 

 used, or the amount of radiation needed 

 may be materially lessened. 



Carrying the system under pressure 

 makes it possible to raise the water to 

 a higher temperature than in an open 

 system, as the boiling point is raised. 

 Everything else being equal, the circa- 



