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SEiPTBUBER 19, 1912. 



The Florists' Review 



89 



1^* 



^'7- 



* ■ -S ; ". 



IMICOi 



HOT WATER BOILER^ 





ESPECIALLY SUITEP FOR v 

 GREENHOUSE W^Rt --^r'^, 



are noted for coal economy 

 and good results generally. 



Are constructed so as to 

 expose the greatest possible 

 heating surface to the di- 

 rect action of the fire, there- 

 by effecting a considerable 

 saving of fuel. 



•'';-i- 



"% 



Wrought Iron and Steel Pipe, Malleable and Cast Iron 



Fittings carried In stock 



IF YOU 

 BIST SPECIFY 



m 



WANT THE 

 THIS BRAND 



ILUNOIS MALLEABLE IRON CO., H841-25 Diversey Parkway, CHICAGO, lU. 



Mention Tbe Review when you write. 



509b SAVED 



Pipes, Flues 



and caslntr thoroughly overhauled and truaran< 

 teed. Qreenhouse fittings of every description. 



ILLINOIS PIPE & MFG. CO. 



2118 S. Jefferson Street, CHICAOO 



Meotioa tbe Review when you writer 



WROUGHT IRON PIPE FOR SALE 



Bethreaded, thoroughly overhauled, in random 



lengtha, guaranteed free from spUts or boles. 



It will par yoa to oomoBiiiiicate trith ma 



ALBBRT ft DAVIDSON 



S17-S8 Union Atc., • Brooklyn « N.I. 



Mention The Review when yoo write. 



where I can get a reliable publication 

 on lettuce growing? H. D. L. 



The twelve horse-power boiler should 

 be amply large to heat a greenhouse 

 20x60 feet. Such a house can be 

 heated to 50 degrees by means of two 

 2M;-inch flow pipes and eight 2-inch re- 

 turns, if hot water is used. One flow 

 pipe and four returns can be placed on 

 each wall; or, if bottom heat is desired, 

 run the flow pipes on the purlins and 

 earry the returns under the benches. 

 An expansion tank holding ten gallons 

 will answer. Connect this with the 

 highest part of the main 3-inch flow 

 pipe, and elevate it as much as possi- 

 ble, though a couple of feet will answer 

 when the flow pipes run downhill. 



For directions for building green- 

 houses, we recommend "Greenhouse 

 Construction. ' ' For the growing of let- 

 tuce and other vegetables under glass, 



IMPROVED RETURN TUBULAR 

 FIREBOX BOJ^BR 



Johnston Heating Co. 



131 E. 26tli St.. N«w York City 



Mention The Review when you write. 



"Greenhouse Management" will afford 

 many helpful hints. Either of these 

 books will be sent postpaid by The 

 Review for $1.50, 



BETUBNS ABS HjOO SMALL. 



I wish to find out whether I have 

 enough piping in my greenhouses to 

 heat them properly in this part of 

 Michigan, where the outside tempera- 

 ture sometimes drops to 20 degrees 

 below zero. I want a temperature of 

 45 to 50 degrees at night. The houses 

 run east and west. House No. 1 is 



A Steady 

 Pressure 



will always 

 b 6 m a i n - 

 tained in 



Jour ateam pipee, no matter 

 ow the pressure at the boiler 

 flnctnates, if yon equip your 

 main lines with these valves. 

 Garry 40 or 60 pounds pressure 

 on the boiler, set the 



Hughson 

 Regulating Valve 



to carry 5 or 10 pounds on the 

 line and you will always have a 

 reserve in case of a sudden drop 

 in temperature. This valve 

 saves both fuel and worry. Ask 

 for catalogue and particiiars. 



Hughson Steam Specialty Ci. 

 S021-3S. State St, CkicMc 



8x45. It contains five runs of 1^-inch 

 pipe under each side bench, fed by a 

 2-inch flow, which goes to the farther 

 end and there drops down to feed the 

 returns. This house is four feet high 

 to the eaves and has two feet of glass 

 in the south side and in the gables. 



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