JuiT 80, 1914. 



The Flodsts' Revkw 



» 



WITH the water boiler 

 , , the entire boiler and 

 all the mains and coils are 

 filled full of water. There 

 are no empty spaces. With 

 a steam boiler only part of it 

 is filled, and a space above 

 the water is necessary for 

 the expansion of the steam 

 so it will be "dry" and not 

 go into your mains water 

 logged. 



The size of this dome has 

 much to do with the economy 

 of any steam boiler. 



To keep manufacturing 

 costs as low as possible every 

 boiler maker strives to re- 

 duce the amount of iron in 

 his boiler as low as possible. 

 The cutting down on the size 

 of the steam space or dome 

 is a favorite way. Small 

 domes produce "wet steam." 

 Wet steam has neither the 

 heat nor the rapidity of cir- 



culation of dry steam. Small 

 domed boilers also frequently 

 "boil over," the water partly 

 or entirely leaving the boiler, 

 which you can at once see is 

 a pretty serious thing. 



The above sections— the 

 left-hand one from a water 

 boiler and the right-hand one 

 from a steam boiler of the 

 same size— show you the dif- 

 ference in their height, which 

 difference is the space given 

 to the Burnham Steam Dome. 



In our new 36-inch Burn- 

 ham* tjie ^team boiler is 6 

 inches higher than the water. 



This liberal sized dome is 

 only one of the Burnham 's 

 economy points— the others 

 are equally important. 



If it's economy you want, 

 then you want the Burnham 

 —the only greenhouse boiler 

 made especially for green- 

 house work. 



fcrigRurnhamg 



SALES OFFICKS 



NEW YORK BOSTON PHrLADELPHIA OHICACK) ROCHESTER CLEVELAND TORONTO 



42d Street Bldflr. Tremont Bldff. Franklin Bank Bldfr. Rookery Bldg. Granite Bldg. Swetland Bldg. 12 Qneen St., East 



IRVINQTON, N. T. 

 DES PLAINES. ILL. 



Mention Tlie Review when you write. 



been known to register as low as 50 

 degrees below zero here. W. F. U. 



The sketch shows the present house 

 to be 20x48, heated by two 214-inch 

 flow pipes and ten 1^4 -inch returns, and 

 it is stated in the sketch that a temper- 

 ature of 55 degrees was maintained 

 last winter, when the outside tempera- 

 ture was 30 degrees below zero. The 

 proposed lettuce house is to be 12x30 

 and will run out from the middle of the 

 south end of the present greenhouse. 

 It is to have two benches and a middle 

 walk. The boiler is at the north end 

 of th« present house. 



HIGHEST PRICED and CHEAPEST 



BOILBRS MADS 



GiBLiN Greenhouse Boilers 



OIBLIH Si 00. 

 1 09 Broad St.. Utica, N. Y. 1 04 John St., New York City 



LET US TELL YOU 

 ABOUT THEM 



Mentltm The BrTlew wben yoo wrltw. 



The letter does not/ state whether 

 steam or hot water is used for heating, 

 but I am inclined to the opinion that 

 it must be steam, from the size of the 

 pipes, and from the fact that while it 

 would be an easy matter to maintain a 



temperature of 50 degrees when 10 

 below zero, it would be a difficult mat- 

 ter to keep up a temperature of 55 

 degrees when 30 below zero, with hot 

 water. For heating the proposed house 

 with steam, I would reduce the pres- 



