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The Weekly Florists' Review* 



F£UUUAR¥ 23, 1911. 



Montgomery County Coal Co. 



TAYLOR SPRINQS OOAL 



OOAL OF MERIT fiseibr ^xjtLjyTNfs,, chicAgo 



Mention The Kevlew when you write. 



SNrni,LINEAWEAVER&CO. 



C A L 



AntlirMlte, BltnmlnoBB, Coke and Gab Coal 



r^r^uf^n,, Philadelphia 



Mention The Review when yon write. 



Greenhouse Heating. 



INSTAUilNG A BOILEB. 



In setting tubular boilers, how much 

 space should be left back of the bridge 

 wall? Does the largeness of the com- 

 bustion chamber add or detract from 

 the heating efficiency of the boiler! 

 Does it aflfect the draft of the boiler? 

 I T. N. 



The location of the bridge is largely 

 governed by the size of the grate. For 

 boilers of medium size it is customary 

 to allow one square foot of grate area 

 to three horse-power, and a little more 

 than this in smaller boilers, where the 

 fires will have less attention. Thus, in 

 a boiler of fifty horse-power there 

 should be about sixteen square feet of 

 grate area, which would bring the 

 bridge about four feet from the front 

 of the boiler. There should be nine to 

 twelve square inches for each horse- 

 power between the bridge and the 

 boiler. The area of the chimney flue 

 should be from one-sixth to one-eighth 

 that of the grate, varying with the 

 height of the chimney. 



A small combustion chamber, in 

 which the fire has to be forced in order 

 to give the necessary heat, will be less 

 economical of fuel than a larger one, 

 in which the desired heat can be devel- 

 oped without forcing. On the other 

 hand, if the combustion chamber is too 

 large, say with an area equal to one-half 

 the horse-power of the boiler, it will be 

 less economical than one that has an 

 area approximately equal to one-third 

 the rated horse-power of the boiler. 



NEW HOUSE, ENLABGED BOILEB. 



Please tell me how to pipe my new 

 greenhouse. I am building one 27 x 100, 

 twelve feet to the ridge and five feet 

 high at the sides, with two and one- 

 half feet of glass in the side walls and 

 with one gable of glass. I have a 

 quantity of 2-inch and 1^4 -inch pipe 

 which I wish to use. How many runs 

 of 2-inch flows should go out overhead, 

 and how many runs of l^^^-inch returns 

 should be placed under the benches to 

 heat this house to 60 degrees! In this 

 part of Pennsylvania the outside tem- 

 perature reaches 5 degrees below zero 

 at times. 



I have a sectional hot water boiler in 

 use now, heating a small house, and I 

 wish to continue to use this boiler. It 

 has five sections now, with a grate sur- 

 face of three and one-half square feet. 

 How many more sections must I add 

 to it, or how many square feet of grate 



a 



Snoomwors to the 

 Jobn Davis Companr 



No lost from sudden drops in 

 temperature if you use the 



Hughson Regulating Valve 



In connection with a steam heating plant. Canr 40 or 

 60 pounds pressure on the boiler and set the valve for 6 

 or 10 pounds— it will do the rest. You'll be free from 

 worry this winter, if you follow this advice: " Install a 

 Huctason Regulating Valve when making your 

 repairs." Ask Tor our Catalogue, which also shows 

 Steam Traps and other devices. 



HUGHSON STEAM SPECIALTY CO. 



5021-5023 S. State St., CHICAGO, ILL. 



Mention The Review when vou write. 



Harrlsburg- Franklin Coal Co. 



1816 FISHER BLD6., CHICAOO 



The Better Grades ONLY of 



INDIANA AND ILLINOIS COALS 



Preparation and Quality as tbey should be. Write to-day lor Prices* 



Mention The Review when you write. 



wrxhe to 



6E0. B. LIMBERT & CO. 



557 fulloii SL, CHICAGO 



—For Prices on— 



fienoioe 

 Wrought Iron Pipe 



Ask For Oatalocae. 



^ ■ / 



MentloD The Review when yon writs. 



Ford S Kendig Co. 



"Spellerized" Wrought Pipe 



Bspecially adapted for Greenhouse Work, 

 Fittinffs, Valves, Tools, etc. 



1428-30-32 Callnwhill St , PHILADELPHIA, PA. 



Mention The Review when yon write. 



surface will it require to heat the 

 amount of pipes you suggest for this 

 house? W. K. J>. 



Emergency Pipe Clamps 



^- ' -11.- . J t -— IWMlCJ i a 



r- --Tr ^-li—rB^- 



To heat this house to 60 degrees, 

 using 2-inch flows and l^^-inch returns, 

 would require six flows and eighteen 

 returns, but, unless the top of the 

 heater is well below the lowest part of 

 the returns, it would be better to use 

 four 2*4-inch flowrf and sixteen 2-inch 

 returns. 



The capacity of a boiler depends upon 

 the arrangement of the fire surface 

 fully as much as upon the size of the 

 grate. To heat the house easily, it 

 would be advisable to use a heater with 

 a rating for 1,500 square feet of radiat- 

 ing surface, and this would require a 

 grate containing five and one-half or 

 six square feet of surface. There should 



To repair splits 

 and rust holes 

 on pipe. Made 

 of malleable 

 iron, and guar- 

 anteed to stop 

 the leaks. 



Send for cat- 

 alogue of 

 Plptf~Iiei>airs and Steam Specialties 



JAMES McCREA & CO. 



Mamifaoturers 

 558-560 Washington Blvd.. CHICAGO 



Mention The Review when vou writp 



HIGH-GRADE BOILERS 



gS^Jue for GREENHOUSES 



STEAM and HOT WATER 



GIBLIN & CO., Utica, N.Y. 



Mention The Review when you write. 



be an increase of jather more than 

 fifty per cent in the number of sections. 



IN EASTERN MASSACHUSETTS. 



I have two greenhouses, which meet 

 at right angles in the form of an ell, 

 with the boiler at the outer comer. 

 The boiler pit is seven feet deep. The 

 larger house is 16x40, with 5-foot walls 

 of glass. The other house is 12x40; its 

 floor is two feet below the ground level, 



