Jdne 30, 1910. 



The Weekly Florists' Review* 



67 



Wilks Greenhouse Boilers 



Are best for small greenhouses, etc. They 



are made of heavy boiler plate and are 



fully guaranteed. 



Have no Cast Iron Sections to Craclc 

 No Night Fireman Required 



With the Wilks Self-feeding Hot Water Boilers. Keep 

 an even and continuous fire for ten hours and longer 



without attention. 



VERY ECONOMICAL IN FUEL 



Send- for Catalogue and t^rlces. 



S. WILKS MFG. CO. 



3523 Shields Avenue, 



CHICAGO 



Mention The Keview when you write. 



There Is a Splendid Chapter oa 



Greenhouse Heating 



In The Florists' Manual 



By WILLIAM SCOTT 



A complete reference book for commercial florists. 253 large pages, 

 fully illustrated. Treats on over 200 subjects concerning greenhouse build- 

 ing, heating, management, and plant culture. It tells you just what you 

 want to know, in just the way you want to be told. 



Second Edition, Price $6.00, Prepaid by Express or MaiL 



FLORISTS' PUBLISHING CO. 



334 Dearborn Street 



CHICAGO 



Description of the Valve. 



"The valve is intended for use in 

 steam heating pipes, to take the place 

 of two valves, a check and a globe or 

 a gate valve, where two such valves 

 are now generally used together; also, 

 wherever a check valve is used alone, 

 such as on pipes carrying condensation 

 from steam pipes to the return pipe, 

 and on return pipes, or city water pipes, 

 or pipes from traps or pumps where 

 they lead into the boilers. In these 

 instances and many others both a check 

 valve and a globe valve are commonly 

 and properly used. 



"For those who are not fully posted, 

 I will explain why both a check and a 

 globe valve are now deemed necessary. 

 The most important is the check valve, 

 to keep the water from other radiators 

 or pipes from backing up into a set 

 which is not in use, and at the boilers 

 on the feed pipes, to prevent water from 



the boilers backing up into the return 

 pipes or into city water pipes. The 

 globe valves are usually placed close 

 to the check valve and between it and 

 the return pipe or the boiler, so that in 

 case the check valve gets out of order 

 the globe valve can be closed and the 

 check valve repaired, pressure being cut 

 off from the inlet by the regular globe 

 valve used to turn on and ofif that set 

 of pipes. 



' ' In repairing any broken pipes, or 

 taking apart any of the pipes, a check 

 valve is never to be depended upon, be- 

 cause of the possibility of the check 

 valve not being in perfect working 

 order and not closed tight. In such 

 cases the unfortunate steamfitter is 

 liable to get a bad scalding from the 

 steam and water forced backward 

 through the inoperative check valve, 

 also permitting the water to drain out 

 of the boilers suddenly, with danger of 

 injury to the boilers.' The risk is so 



^Bumham 



I 



This type boiler is made for shallow 

 cellars— the side hub outlets making the 

 boiler and connections considerably lower 

 than with the tapped connections on top. 



Lord & Burnham Co. 



IRVINGTON, N. Y. 



New York Boston 



Philadelphia Chicago 



Mention The Keview when you write. 



great that a practical steamfitter will 

 always put a globe valve between the 

 check valve and the boilers. 



"There is no kind of valve which 

 gets out of order quicker than the regu- 

 lar check valves. This first nuisance, 

 together with the extra labor and ex- 

 pense for putting in two valves where 

 oftentimes there is barely room enough 

 for one, set me to studying out some- 

 thing better and the result is my in- 

 vention of a combination check and 

 globe valve, two in one. 



"This valve at first glance resembles 

 the ordinary globe valve, but by refer- 

 ring to the drawing it can be seen that 

 the disk or plunger is entirely free from 



