

M 



The Florists' Review 



^■PTBMBEB S, 1012. 



THE TRAVIS GREENHOUSE ROCKER GRATES 



Are Bcienttflcally construoted. 

 We build Rocker Orates only, 

 and know what your require- 

 ments are. Boiler Builders arc 

 not In a position to give you the 

 rocker (rrate service you can 

 receive from us. Our Grates 

 are hlKh-class, dependable, and 

 strictly up-to-date. They are 

 properly constructed and stand 

 on their own merits. Strictly 

 self-contained and ready for 

 business when you receive the m 

 Can be Installed In one or two 

 hours time by any operator. Investigate our gmtes and 



G. E. TR4VIS CO., 



Greenhouse Heating. 



A READEE in Cleveland sent, August 20, 

 a heating inquiry that was incomplete, 

 the second sheet, with part of the ques- 

 tion and the signature, being missing. 

 If he will repeat his question in full it 

 will be answered with pleasure. 



Thb smokeless coals are in demand. 

 FSiel dealers report the greenhouse trade 

 taking hold strongly now that September 

 has arrived. The forehanded growers 

 bought several weeks ago and saved con- 

 siderable money. Summer is the time 

 to buy coal, winter the time to buy ice. 



The worst car famine in United States 

 history may result this fall, according 

 to figures in a bulletin warning issued 

 August 30, ,by W. A. Garrett, chairman 

 of the Association of Western Railways. 

 Better get your coal in P. D. Q.; the car 

 shortage is expected to develop in Oc- 

 tober. - . 



CANNOT HEAT THE HOUSES. 



We have three connected greenhouses, 

 each 25x100, heated with hot water. 

 Tlie outside wall on the east is seven 

 feet high, double boarded; on the west 

 it is three and one-half feet high, dou- 

 ble boarded. We have a Kroeschell 

 boiler, about twelve feet long, with two 

 4-inch flows. There are six 1%-inch 

 pipes under each 6-foot bench. These 

 are put in from a header running to the 

 far end of the greenhouse, where they 

 are connected to returns by return 

 bends. We should have a temperature 

 of 56 degrees, with zero outside, but 

 the former greenhouse attendants tell 

 me that the temperature gets down to 

 freezing at the farther end from the 

 boiler, in spite of hard firing. Our lo- 

 cation is southern Pennsylvania. What 

 do you think is the trouble and how 

 would you remedy itf E. W. B. 



To maintain a temperature of 56 de- 

 grees, a greenhouse 25x100 feet should 

 have 900 square feet of radiation, and 

 for three such houses a boiler should 

 have a rating of 3,000 feet and up- 

 ward. 



The number of benches is not given, 

 but is probably three, making a total 

 of eighteen 1^4 -inch pipes for each 

 house, since there are six pipes under 

 each bench. The trouble evidently 

 comes from trying to use 1^-inch pipe 

 for both flows and returns. It would 

 have been best to put in three 2^ -inch 

 flow pipes and eleven 2-inch returns in 

 each house. If the present piping is 

 to be utilized, I would advise the use 

 of three 2%-inch flows overhead, con- 



our methaaFof serving our customers. Give size of your furnace and we will quote you prices. 



u xs Henry, 111., U. S. A. 



Mention The Review when yon write. 



A Special Discount of S 



will be given every greenhouse buyer who will 

 place an order of 3 cars or more for any green- 

 house grade of coal before Sept. 15. The condition 

 of tbe coal market and the serious car shortage do 

 not warrant this offer, but it is made merely to add 

 , a few more florist customers to our already big list. 

 You can save $2.50 per car on this oSer. Coal to 

 be delivered by Oct. 30. We handle all grades of 

 bituminous coals. What do you want? Let your 

 order come. 



% 



UNITED COAL SALES CO. 



SPECIALISTS IN 



FLOKISTS' COALS 



FISHER BLDG.. CHICAGO. ILL. 



Mention The Itevlew when yoa write. 



necting them with fifteen of the 1%- 

 inch pipes, to be used as returns. Un- 

 less the return pipes are above the top 

 of the boiler, attach a generator. 



TOO MUCH PIPE IN BETUSNS. 



We have a Furman sectional steam 

 boiler, rated at 4,350 square feet, heat- 

 ing the following houses, in this New 

 York climate: 



No. 1, even-span, 28x117; walls 6 feet, with 

 2 feet of glass ; ridge, 12 feet. 



No. 2, %-8pan, 14x125; ridge 9 feet; north 

 wall 4 leet; Bonth waU 3 feet. 



No. 3, %-span, 22x125; ridge 13 feet; north 

 wall 8 feet; south wall 4 feet. 



No. 4, lean-to, 8x125 ; north wall 3 feet. 



No. 5, even-span, 20x100; ridge 13 feet; west 

 wall 4 feet; east wall 7 feet. 



No. 6, extension to No. 5, contains 5 runs of 

 2-lncta pipe, each 25 feet long. 



No. 7, lean-to, 8x60; east wall 3% feet. 



You will notice the arrangement and 

 size of the steam mains on the enclosed 

 sketch; also the temperature desired. 

 The returns are all 2-inch pipe. We 

 run from zero to five pounds of pres- 

 sure on the boiler and the supply pipes 

 are too small, ao that the difference in 

 pressure between that in the boiler and 

 that at the extreme end of the mains 

 is so great that the water backs up in 

 the steam returns, lowering the water 

 line in the boiler and cauiiAg it to 

 jump up and down from three to four 

 inches in the water gauge, also some- 

 times emptying the water entirely from 



the boiler when it is pushed in ex- 

 tremely cold weather. 



The boiler is set at least two and one- 

 half feet below the lowest returns. 

 Kindly tell us the proper size of pipe 

 to use, beginning at the boiler, for 

 mains, and the number of 2-inch lines 

 for the houses. The boiler has three 

 5-inch outlets and the same for returns. 



H. W. B. 



The principal trouble probably comes 

 from using 2-inch pipe, instead of 1%- 

 inch pipe, for the coils. In house No. 1, 

 28x117, there are now one 2%-inch flow 

 and ten 2-inch returns. The flow is 

 amply large and six 2-inch returns 

 would be enough to furnish 50 degrees. 



In house No. 2, 14x125, the flow is 

 2-inch, with six 2-inch returns. Three 

 returns snould sufiSce. 



For house No. 3, 22x125, and house 

 No. 4, 8x125, one 3-inch flow is used. 

 There are ten returns in No. 3 and 

 three in No. 4. The flow is larger than 

 is required, and in house No. 3 six re- 

 turns would answer for 60 degrees, 

 while two returns would be enough for 

 house No. 4, where 45 degrees is re- 

 quired. 



In house No. 5 there are mains suffi- 

 cient to supply one-half the required 

 radiation. Four returns should be 

 enough for 60 degrees. 



