

■ 1 .'-r-l'^^-- .■ : •■ ' 



62 



The Weekly Florists^ Review* 



September 17, 1908. 



We 'want to send you the names of the 

 nearest florists 'who are usingf the Martin 



ROCKING GRATE 



Drop UB a postal and we will send you the 

 names of growers you know are good busi- 

 ness men. 



See it \vorking and you will order the Martin Rocking Qmte for 

 the new boilers to be put in this season. Write for catalog:ue and 

 prices. c 



IT SAVES COAIi 



Martin Grate Co. 



283 Dearborn St., CHICAGO. 



Send order now— we will make up the crates and hold until 



you say ship 



Mention The Kevlew when you write. 



to return to the boiler. The two flows 

 have five and one-half feet drop at the 

 south end and the return has about three 

 and one-half feet drop at the boiler. 

 These houses are for miscellaneous stock. 

 I have only about six inches above the 

 flow pipe at the boiler for my expansion 

 tank. It holds forty gallons. .Where 

 should I couple the tank; on which flow? 



S. K. 



I fear the piping you have planned to 

 install will not maintain a satisfactory 

 temperature for all winter work with a 

 miscellaneous lot of plants. I would not 

 consider it safe to figure on less than 

 a 60 degree temperature for mixed stock. 

 This would require nearly 400 square 

 feet of radiation in the houses, which 

 would require at least five lines of pipe. 

 You plan for four. If you think 45 

 degrees safe for your stock, then your 

 plan will probably be all right. I would 

 not attempt to use an overhead flow with 

 4-inch cast-iron pipe, but should plan to 

 put all the pipes under the benches. 

 Make the high point in the system at the 

 south end and give the pipes a good 

 grade. Connect the expansion tank with 

 the main return near the boiler, not with 

 the flow. Carry the expansion tank sev- 

 eral feet above the highest point in the 

 system, even if you have to build a box 

 or tower on top of the boiler-shed to 

 house it. I would suggest eight to ten 

 feet in your case. If the boiler has two 

 openings into which returns can be car- 

 ried, I would prefer to return each house 

 independently to the boiler. If there is 

 only one return opening, carry them 

 close to the boiler before uniting them. 



L. C. C. 



HEAT FROM RESIDENCE. 



I am building a greenhouse 14^/^x47 

 feet, four feet to the eaves and nine and 

 a half feet to the ridge. I expect to 

 grow a general line of plants. Please 

 state how you would pipe the greenhouse 

 from a hot water boiler in the cellar of 

 the residence, about thirty feet away. 

 What size of pipe should be used for the 

 flow and what size for returns, and what 

 is the most practical way of placing 

 them? How would you protect the flow 

 and return between the residence and 

 greenhouse, so as to prevent loss of radia- 

 tion? My location is southern Ohio. 



W. B. 



A good plan to follow will be to carry 

 a 2-inch flow and a 2-inch return directly 



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