766 



The Weekly Florists' Review* 



January 24, 1907. 



Greeohoose Beating. 



AMOUNT OF PIPE. 



My house is 28y>.\100. How much 

 pipe will it take to heat to 58 degrees 

 wheu it is 10 degrees below zero? 



W. B. 



Since you do not mention the size of 

 pipe you are to use, I have figured the 

 requirements of the house on the basis of 

 using 2-inch pipe. In order to maintain 

 a temperature of 58 degrees it will re- 

 quire the use of 1,600 feet of 2-inch pipe. 

 This can be distributed into four coils of 

 four pipes each, one pipe in each coil 

 serving as a flow, with three returns. 

 If fewer coils are desired, the size of the 

 flow pipe to each will require to be larger 

 than 2-inch. If three coils are used each 

 flow should be 2i/->-inch pipe. L. C. C. 



ABOUT BOILERS. 



How many square feet of radiation 

 can be allowed per horse-power in rating 

 a boiler for steam heating? How can I 

 rate a tubular boiler of any given di- 

 mension and number of flues of given 

 diameter? What is the ratio between 

 flue area and grate surface? 



W. H. C. 



The basis for estimating horse-power 

 in boilers of various types is quite differ- 

 ent and is not the basis on which the 

 heating capacity of the boilers is rated. 

 The heating capacity is computed from 

 the area of the boiler exposed to the ac- 

 tion of the heated gases, or its heating 

 surface. Koughly speaking, one square 

 foot of heating surface in a boiler will 

 care for eight square feet of radiation in 

 the greenhouse, but this varies with the 

 style of heating and the temperature to 

 be maintained. The ratio existing be- 

 tween grate surface and heating surface 

 in the boiler depends on the character of 

 the fuel used. One to forty is the usual 

 ratio for hard coal and one to eighty for 

 soft coal. 



We will be glad to give specifications 

 for specific cases, which is the only satis- 

 factory plan. L. C. C, 



PIPING EIGHT GREENHOUSES. 



We have eight north and south 

 houses, even span, connected, each 18x 

 100. The valleys are six feet high, 

 ridges eleven feet. We wish to grow 

 carnations in three houses and Grand 

 Rapids lettuce in the remaining five. 

 The mercury seldom falls below 15 de- 

 grees below zero. How much 2-inch 

 pipe shall we need and how should it be 

 arranged? Could we have a 6-inch flow 

 at the north end, running east and west, 

 connect the 2-inch pipe with a manifold, 

 run the 2-inch along the west sides of 

 the other houses and back again on the 

 east side of the same house, connecting 

 into the return at the north end, which 

 is a 4-inch? R. B. 



The arrangement of the main riser, or 

 flow pipe, is all right, and it can be 

 carried near the gable or near the floor, 

 whichever is more convenient, provided 

 both the flow and returns are at least 

 three feet above the water line of the 

 boiler. The piping of the houses will 

 give the best satisfaction if arranged 

 about as follows: Carry a 2-inch flow 

 under the ridge of each house from the 



WILKS GREENDOUSE HEATERS 



The Wilks Greenhouse Heaters 

 are all Steel Self-Feeders. 

 Will run 16 hours at a time 

 without attention. 



NO NI6HT FIREMAN REQUIRED 



Can be used with either 

 HARD OR SOrr COAL. 



BEVD FOB OUB HEW OATA^OOUS. 

 MADB BT 



S. WILKS MFG. CO. 



35th and Shields Avenue, 



CHICAGO, ILL. 



niD DOOI 



Mention The Review when yon write. 



DO TOU SNOW ABOUT TUB 



Martin Rockiflg Me 



■T SAVES COAL 



MARTIN GRATE CO. 



288 Dearborn 8t. 

 CHICAGO 



Mention The Rerlew when yon write. 



FURMAN BOILERS 



SAVE FUEL 



Write for Catalogue 



See advertisement in last week's 



Review and watch for it next week. 



THE HEBENDEEN MFG. CO., Geneva, N. T. 



Mention The Review when yon write. 



Write Us Your Wants in 



Heating Specialties 



We supply everything needed for a 

 Greenhouse Heatingr Plant. Booklet 

 for the asking. 



HENION A HUBBELL 



61-69 N. Jefferson St., CHICAGO. 

 Mention The Review when yon write. 



main riser to the south end of the house ; 

 there divide it to supply the coils to be 

 located under the benches or on the side 

 walls. In either event, with steam, it 

 will be better to use 1^-inch pipe for 

 the returns or main heating pipes and 

 each house should have nine such pipes 

 supplied from the one 2-ineh flow. The 

 nine returns if arranged in manifolds on 

 the side walls should be united to empty 

 into the main return, which, if it is a 

 2-inch, will be ample for the plant in 

 question. L. C. C. 



FLORENCE 

 BEATERS 



ABE MADE IN A WIDB VARIETY 



OF STTI.es, 



ARE SIMPI.T CONSTRUCTED, 



EASILY ERECTED 



AND ABB 



UNIVERSAL 



ACCELERATING CIHCULATION. 



In the Eeview of January 10 there is 

 a query from J. A., regarding his heat- 

 ing system, I would like to offer him 

 a few suggestions. I cannot from his 

 description fully make out just how his 

 pipes are arranged, but think I under- 

 stand enough to locate his trouble. 



He says there are six flows, leaving a 



FIEL BURNERS 



For New 1007 Catalogae, addresi 



Colombia Beater Co. 



BELVIDERE, ILL. 



Sales Dept., 36 Dearborn St., Chicago 



main, with risers about ten inches high, 

 and these go to the far end of the house 

 and return through ten returns; I pre- 

 sume, to a main and thence to the bot- 

 tom of his boilers. Now, he does not 

 say what size that main is. I take it 

 that this main runs across the end of 

 the house and the six flows come off 

 at certain distances by tee branches. 

 Now, I think here is the trouble: Those 

 tees have the outlet on the upper side 

 of the main, and rise ten inches to an 

 elbow. Those outlets are, perhaps, the 

 same size as the main and flows. If so, 

 the circulation is too free in the first 

 one or two flows nearest the boiler, rob- 

 bing the branches farther along; and 



