76 



The Florists' Review 



ItSK I, 1915, 



next to the outer walls and at each suia 

 of the center row of posts. The hous«i» 

 will be heated with hot water. The 

 returns will be under the benches. The 

 boilers will be in a pit and the highest 

 point of the heating system will be at 

 the boiler end of the houses. 



According to our plan, three 4-inch 

 boiler tubes will be used as flows iu 

 •each house, with a gradual drop to the 

 farther end of the houses. Nine re- 

 turns will be used in each house, five 

 under the outer bench and four under 

 the inner bench. In connecting the 

 flows and returns, IV^-inch gate valves 

 will be used. Will the piping described 

 'be sufficient to heat these greenhouses 

 to a temperature of 60 degrees when 

 the outdoor temperature is 15 degrees 

 below zero? What should be the ca- 

 pacity of the boiler? 



H. J. A. C— O. 



From the foregoing letter, it is evi- 

 dent that it is proposed to use three 

 4-inch boiler tubes as flow pipes in ea<'h 

 of the houses, as well as nine returns, 

 but the size of the return pipes is not 

 stated. If they are to be 4-inch, they 

 will furnish the needed amount of radi- 

 ation. We would suggest the use of a 

 boiler having a rating of 5,000 square 

 feet of hot water radiation, to heat 

 the two houses. 



From the size of the gate valves 

 mentioned, it would appear that 1^- 

 inch pipes are to be used for connecting 

 the flows and returns. Since each of 

 the returns provides nearly 200 square 

 feet of radiation, we would prefer to 

 use 2-inch pipes for this purpose. The 

 use of the boiler tubes as proposed will 

 give good results if 2-inch connections 

 are used. 



H ThlB Krapery was erected by us for 



H Mrs. George Wilson of Philadelphia. 



M on her estate at Great Neck-one 



I of fashionable Long Island's most 



prominent show places. 



I The JACOBS full iron frame and 



B patented cast iron eaves and sills, 



I together with the removable gutter 



1 and leader, make this greenhouse 



1 just as perfect in every practical de- 



1 tail as any of the larger structures 



B owned by professional growers. 



I WE KNOW WHAT TO DO 



I AND WHAT NOT TO DO 



B What's more, we can save money 

 g for you. 



I S. Jacobs & Sons 



I GREENHOUSE BUILDERS 



1868-1381 FlushinB Avenue 

 BROOKLYN, N. Y. 



iHllllllllllllltUIIIllll 



Mention The ReTl«w when yon write. 



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