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Mat 6, 1910. 



The Weekly Florists^ Review* 



8) 



TUBULAR 

 BOILERS 



8TSAM AND WATER 



Tbe most economical and efllclent 

 Boiler for Greenl&ouae Beatinflr. 



JOHNSTON HEATING CO. 



138 East 31st Street, NEW YORK 



Mention The Review when you write 



2-inch returns will be required, in addi- 

 tion to one 3-inch flow pipe. Even better 

 results could be obtained by using three 

 2V^-inch flow pipes and six 2-inch re- 

 turns. For the rose house, use three 2^- 

 inch flows and nine 2-inch returns. 



Southern pine will be found a good 

 lumber for the greenhouse floor. It should 

 be laid closely, to prevent injury to the 

 plants by coal gas. 



BOILER AND BUILDING. 



We wish to get your advice on a few 

 points in regard to greenhouses. Which 

 is the better, a sectional boiler or a hori- 

 zontal tubular boiler? How much lower 

 should the boiler be than the return pipes, 

 to secure good circulation? What is the 

 best size and style of pipe for carnation 

 and chrysanthemum temperatures ? Should 

 there be two rows of top ventilators and 

 should they open from the ridge or the 

 header? What system of water supply 

 is now generally used, the overhead tank 

 or the underground air-pressure system? 

 What extra glass is a boiler capable of 

 heating before the next larger size is re- 

 quired, as in the case of an increase in 

 the amount of glass? A. F. C. 



While the sectional boilers have ad- 

 vantages, especially if the glass is likely 

 to be enlarged, many florists are using 

 for large ranges something in the nature 

 of horizontal tubular boilers. Several 

 styles of each class are advertised in the 

 Review; send for the manufacturers' 

 literature, acquaint yourself with the 

 merits of each, and you will then be able 

 to select the one best suited to your 

 needs. 



The higher the returns above the boiler 

 the better, but good results can be ob- 

 tained where the lower ends of the return 

 are two feet above the top of the boiler, 

 in small houses. 



For houses up to 200 feet in length, it 

 is a good plan to use 2% -inch flows, al- 

 lowing one for 250 to 400 square feet of 

 radiation. These can be upon the plates, 

 or part of them may be on the purlin 



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THE KROESCHELL BOILER 

 NOT CAST IRON 



HAS 



WIITEB 



FRONT 

 SIDES 

 TOP 

 BACK 



Hew Catalogue and prices on appUcatioD. 



Kroeschell Bros. Co. 



444 Erie St., Chicago 



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IMICO 



Hot Water Boilers 



Made by 



ILLINOIS MALLEABLE IRON CO. 



1801-1825 Diversey Boulevard 



CHICAGO 



Are noted lor coal economy and 

 good results c^enerallj 



SKND FOR CATALOGUS 



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posts. Then use enough 2-inch returns so 

 that there will be (including the surface 

 provided by the flow pipes) one square 

 foot of radiation to four square feet of 

 glass. 



One line of ventilators hinged at the 

 top is generally used. 



The elevated water tank has been and 



is generally used, although the under- 

 ground pneumatic tank is now being in- 

 stalled by many. 



In selecting a boiler it is always well 

 to use one which is twenty-five per cent 

 larger than is likely to be required,' and 

 if this has been done the amount of glass 

 can be increased to that extent. "When a 



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