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ACOCST 13, 1914 



The Florists' Review 



97 



Lifting 

 the Lid 



WE TALK a lot about the Burnham's long fire 

 travel making a short coal bill, but to make 

 plain exactly how the Burnham fire travels, 

 has always been a bit difficult. Not that it's a compli- 

 cated travel, but that it's hard to picture to another 

 what the inside of a boiler is, even with the help of 

 interior views. 



So to show you exactly how it is, we finally con- 

 cluded that the best way was to lift the lid right off 

 like this. Now you can see that the hottest parts of the 

 flames in the combustion chamber (or lower story) strike 

 in the space (or fire channels) between each section, and 

 are led each side to the side flue openings, and up into 

 the upper story, or where the fire travel begins. 



By starting at this upper story, outside division or 

 flue, you see that the hot yases pass from the front to 

 the back, and then front and back again, before reach- 



From the 

 Burnham 



ing the smoke box. A three times back and forth 

 travel. 



Passing on their travels, between water fllled pas- 

 sages or flues, it is plain to see that by the time the 

 gases reach the chimney there can be very little heat 

 left in them. 



Now to go back to the lower .story again, you can 

 see that because the hottest flames, in coming in direct 

 contact with the water bounded channels, between each 

 section, and then drawn to the side openings into the 

 upper story, that an equal amount of heat comes in 

 contact with every one of the sections. It is this that 

 makes each Burnham section equally etticient. 



Mainly because of this and the long fire travel, the 

 Burnham greenhouse boiler makes the shortest coal bill. 



Order now and we will hold and ship the very day 

 you send us word. 



|or4 BiBtiriihamlo. 



SALK» OrnCESi 



^■W TORK BOSTON PHILADELPHIA OHICAOO ROCHESTER CLEVELAND TORONTO. CAN. 



«2d Street Bids. Tremont Bld«. FrankUn Bank Bld«r. Rookery Bldg. Granite Bldg. Swetland Bldg. 12 Qaeen St., E. 



rACTORIKS 



IRVINGTON, N. Y. 

 DE8 PLAINES, ILL. 



Mpntlon Tbp RptI^w when too writ**. 



^« .^^.* 4-inch main should be used, and 

 ir it is possible and desirable 'to return 

 tfle drip water a 2-inch pipe will be 

 lequired for that purpose. 

 .■^ ^cpth of two feet will answer aa 

 The covering for the pipe, and even less 

 than this might be used. The heating 



pipe should be covered with asbestos 

 packing and should either be enclosed 

 in a cement conduit or in sewer pipe. 

 If the former is used it should be 

 twelve inches wide and ten inches high 

 inside if two pipes are used, or ten 

 inches square for the flow pipe only. 



An 8-inch sewer pipe will be required 

 for the feed pipe and a 6-inch one for 

 the return. The wall of the concrete 

 conduit should be about tfiree inches 

 thick and cement slabs two inches thick 

 can be made for covering it. If near 

 the surface, where teams will pass over 



