56 



The Weekly Florists^ Review* 



Ji:iA- :.'3, 1008. 



We 'want to send you the names of the 

 nearest florists who are usingf the Martin 



ROCKING G^ATE 



Drop U8 a postal and we will send you the 

 names of growers you know are good busi- 

 ness men. 



See it working and you will order the Martin Rocking Grate for 

 the new boilers to be put in this season. Write for catalogue and 

 prices. 



IT SAVES COAL 



Martin Grate Co. 



283 Dearborn St., CHICAGO. 



Send order now— we will make up the srates and hold Until 



you say ship 





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fireenhouse Heating. 



ESTIMATING THE RADIATION. 



In figuring radiation for a greenhouse, 

 in this Michigan climate, about what 

 surface area of hot water pipe should 

 be allowed per square foot of glass, for 

 say 65 degrees, with zero weather out- 

 doors? C. S. D. 



In your climate, to maintain a tem- 

 perature of 65 degrees during zero 

 weather, it will be safe to figure one 

 square foot of radiation for four square 

 feet of exposure, including roof, sides, 

 ends, etc., in the house, with water at 

 180 degrees^ L. C. C. 



LIKE TWO SEPARATE HOUSES. 



I am constructing a greenhouse in 

 Ohio, 16x62 feet, and intend placing the 

 boiler on the north side of the building 

 near the center, the boiler-house to be on 

 the outside of the greenhouse. I have a 

 Hitchings No. 108 hot water boiler, 

 tapped for 2-inch pipe as follows: Four 

 tap holes in the top, two in the bottom 

 and one on each side. One part of the 

 greenhouse is three feet lower than the 

 other part. I would like to know how to 

 pipe this building for the best results. 

 I have an expansion tank holding fifty 

 gallons. How much lower than the lowest 

 floor would I have to place mv boiler? 



M. L. C. 



I believe it will be best to pipe the 

 two rooms of your greenhouse independ- 

 ently; that is, run a separate flow and 

 return from the boiler direct to each 

 room. A 2-inch flow direct from boiler 

 to each room, preferably carried under 

 the ridge, and dropping at the most dis- 

 tant point to return by twelve 2-inch re- 

 turns, should provide radiation sufficient 

 for all ordinary stock. This will require 

 that the expansion tank be at least ten 

 feet above the ridge of the house and 

 connected directly with the main flow 

 near where it enters the boiler; 



L.C.C. 



USING BOILER TUBES. 



We have a small house that we have 

 been heating with 3-inch boiler tubes 

 with good results. We intend building 

 some larger houses and would like to 

 know if you consider it practical to heat 

 them with the 3-inch tubes? If so, kindly 

 let me know where the mains and re- 



IMPROVED STXXL RXTURN TUBULAR BOILKR, FOR 8TKAM AND HOT WATXR 



JOHNSTON HEATING CO 



1 38 East 31*t Straat, NEW YORK 



Mention The Review when you wrjtp. . 



Pipe FMings -- Imico Boilers 



rOR GRKKNHOUSK WORK 



ILLINOIS MALLEABLE IRON CO. 



5S0 DIVSR8KT BOULEVARD CHICAGO. 



turns should be located and how many 

 runs of 3-inch tubing it will take for a 

 house 2IV2X6O? The walls will be six 

 feet high, connected to another house. 

 We must keep a temperature, in Ontario, 

 for a general assortment of plants. How 

 many tubes for a house 21V^x.50, with 

 walls six feet high, for lettuce, and one 

 connected to it, of the same size, for 

 growing a general assortment of plants? 

 We also have a house 21%x60 that has 

 five rows of 2-inch pipe under one bench, 

 four under the other and fed by two 

 2-inch pipes run one under each gutter. 

 We wish to use this house for carnations 

 and would still use the 2-inch pipes. 

 How many runs will it need to keep a 

 temperature for carnations? We have it 

 15 degrees below zero and would like it 

 figured on that basis. W. S. P. 



The house 21^4x60 feet should have nine 

 lines of 3-inch tubes installed to safely 

 hold the house at 60 degrees. One 3-inch 

 flow or supply pipe will be sufficient for 

 such a house. It will probably be best 

 to use the main flow under the benches 



The John Davis Co. 



HsUtod, SM lad UslW StNM 



CHICAGO. ILL. 



Wannt x i t urw and Whotoaaton of 



Wrought Iron Pipe 

 Cast-iron Fittings 

 Valves. Pumps 

 Steam Traps 



•ad •TvrTtblns naad la » StMun Plant 



A majority of the Houses are cbanglnr 

 from water to steam. The only pipe to om 

 ii the genuine Wrought Iron and "Byers" 

 Is tlM DMt made. Wbttx Us roB Paicxa. 



^. 



wa BxrxBTO 



BIMRT k WASHBUKf 



fOIHUIAirif BB08. CO. 



fiKOBfil SCIlfBERe 



nXBB SEIHBIM 



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