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July 6, 1916 



The Florists^ Review 



Thickness and Thinness 

 How they Both Count in Burnham ^q^ 

 Boiler Economy 



fflHE right thickness of the 

 casting of each section means 

 the right strength. Uniform 

 aess means an equal strength 

 at all points. Thick in some places 

 and thin in others, means the sec- 

 tion is only as strong as the thin- 

 nest spot. 



The section shown here of a 

 water boiler is just the way it 

 looked after breaking out the side 

 to prove to ourselves, as we do 

 every so often, that the castings 

 are being made uniformly thick. 



But there's another side to this 

 thickness question and that is: The 

 thinner the iron the quicker it trans- 

 mits heat to the water. 

 So we have worked out 

 the thickness to a point 

 where it has the right 

 strength and some to 

 spare, but not so thick 

 as to hinder quick heat- 

 ing. 



Note on this section, 

 that hollow ridge run- 

 ning down the leg, 

 coming in direct con- 

 tact with the hot fire. 

 It's one of the several 



important points contributing to 

 Burnham economy. 



Now take a glance at the cut 

 above that looks like a bunch of key 

 holes. Notice how narrow they are 

 when coming in direct contact with 

 the burning flames, and then larger 

 at the top. The narrow part gives 

 a thin amount of water coming in 

 contact with a large amount of 

 heated surface, causing quick heat- 

 ing. The enlarged part at the top 

 gives room for expansion and rapid, 

 frictionless circulation. 



Here then are some few of the 

 reasons why the Burnham heats so 

 quickly, circulates so rapidly, burns 

 so little coal, and lasts 

 so long. 



It was designed to 

 do all these things bet- 

 ter than other cast 

 iron boilers; and it 

 does them better. 

 Freights are slow- 

 railroads are short of 

 cars. Order your 

 Burnham before you 

 want it and then 

 you'll have it when 

 you need it. 



lpf4> S]Burnhamio. 



SALKS orriCEs 



PHUiABELPHIA 



Widener Bldf 



TORONTO 

 Royal Bank Bld«. 



OHIOAOO 

 Rookery Bld«. 



MONTREAL 

 Transportation Bids. 



ROCHESTER 

 aranlt« Bldg. 



CLEVELAND 

 Swetland Bldir. 



FACTORIKS/JRVINGT^ N. Y. 

 VDES PLAINES. ILL. 



ST. CATHARINES, 

 CANADA 



Mention The Renew wben j<nt write. 



feet high and tweuty-eight inches of 

 glass. The ridge is eleven feet high. 

 A glass partition separates the houses. 

 The end wall of one house appears to 

 be exposed, while that of the other 

 house is protected by a garage. The 

 location of the boiler is not indicated, 

 but, presuming it is in the garage, it 

 will be advisable to use the room ad- 

 joining the garage for cucumbers and 

 similar plants. 



For heating the two greenhouses, 

 about 250 square feet of radiation will 

 be needed and we would select a boiler 

 rated at 400 square feet of radiation. 



If to be used for heating the garage 

 also, it will be none too large if it has 

 a rating of 500 square feet. To heat 

 the greenhouses, we would run a 21/4- 

 inch overhead flow pipe about two feet 

 below the ridge to the farther side of 

 the carnation room, and, dropping 

 down a 2-inch pipe on either side of the 

 door, supply with each pipe three 2-inch 

 returns, which should be carried to the 

 corners of the house and then along 

 the walls of the carnation and cucum- 

 ber rooms back to the garage. 



This will supply the 100 square feet 

 of radiation needed in the carnation 



house, but, if cucumbers are to be 

 grown successfully during the winter, 

 the radiation in that Louse should be 

 sufficient for 70 degrees in zero weather. 

 The pipes which pass through the cu- 

 cumber house from the carnation house 

 provide about sixty-two square feet of 

 radiation, while 150 are needed. To 

 secure this, drop down a 2-inch pipe 

 from the main flow pipe overhead, at 

 the point where it enters the carnation 

 house, and with this feed two coils, 

 each containing four 2-inch pipes, run- 

 ning in either direction from the door 

 of the carnation house to the corners 



