142 



The Florists^ Review 



Maucii 2, 19_'2 



zoiital, rctiini-fluc, tubular boilt'r might 

 have five or six times as mucli direct fire 

 surface as its grate surface and fifty or 

 sixty times us mucli indirect flue sur- 

 face. On tlie otlier liand, a liorizoutal, 

 sectioiial boiler would have not much 

 more than three times as much direct 

 fire surface as it has grate surface, while 

 the indirect heating surface would be 

 less than ten times and possibly only five 

 times as large .is the grate surface, es- 

 pecially if soft coal is to be used as 

 fuel. "With eitlicr a tall chimney or one 

 with a large dianu'tcr, the relative 

 amount of indirect heating surface 

 could be materially increased. 



The efJiciencj' of either direct or indi- 

 rect heating surface will be inversely 

 ])roportional to the amount of surface. 

 This relates to the heat that would be 

 supplied and not to the economy gained. 

 The latter would, of course, be in- 

 creased if there is a reasonable amount 

 of indirect radiation. From the forego- 

 ing, therefore, it will be readily under- 

 stood that unless one knows the type of 

 boiler, the size and the relative amount 

 of direct and indirect heating, one can 

 not tell how many feet of eitlier direct 

 or indirect heating surface there 

 should be. 



In the case of steam boilers an old 

 rule was to estimate that each horse- 

 power of the boiler will supply 100 

 square feet of radiation, but while this 

 would be ajtproximately correct for large 

 boilers where there is a regular fire- 

 man, it would be more satisfactory if 

 the radiation is limited to fifty square 

 feet of radiation for each horsepower 

 if the boiler is a small one. When hot 

 water is used nearly double as much 

 radiation can be carried per horsepower 

 as with steam. 



A simple and fairly aciMirate method 

 of estimating the horsepower of a tubu- 

 lar boiler is to consider that each tube 

 three inches in diameter and twelve 

 feet long will furnish steam equivalent 

 to one horsepower. For tubes longer or 

 shorter than twelve feet or more or 

 less than three inches in diameter the 

 boiler will be projiortionately more or 

 lt>ss than one horsepower for each tube. 



PIPE and FLUES 



A LL SIZES of second-hand pipe, with 

 ^ new threads and couplings, in ran- 

 dom lengths or cut lengths. Also 

 make a specialty of handling boiler 

 flues for retubing boilers or for green- 

 house piping. All flues are trimmed 

 and thoroughly cleaned by machine. 



JOHN GROH 



1885 Clyboum Ave., CHICAGO, ILL. 



Mention The Review when you write. 



Union Grate 



A Rocking Grate that Saves Coal 



Write for catalogue and prices 



MARTIN GRATE CO., "^%5,^a'5S'^* 



IfeDtton Th* ReTlew when yon writa. 



ESTABLISHED 1857 



S. WILKS MFG. COMPANY 



Manufacturers of 



WILKS HOT WATER BOILERS 



FOR GREENHOUSE HEATING 

 3517-3539 SUeldi Ave., CHICAGO, ILL. 



Order Now 

 $40.00 



Keep a Daily Record of Tem- 

 peratures in Your Greenhouses 



J. K. Alexander, the dahlia 

 kUiK. East Bridvewater, Mara., 

 writes, under date of Deo. 7, 

 1921: "Your thermometer ia the 

 best I have seen for my busi- 

 ness." 



Records are as important in 

 the growing business as in any 

 other business. Progressive grow- 

 ers who spare no eflort in raising 

 highest grade 8tocl< use Standard 

 Recording Thermometers and 

 Itnow the great aid of keeping 

 records of temperatures. Tour 

 equipment is far from complete 

 If yoU have no Standard Record- 

 ing Thermometer. 



The actuating element of the 

 Standard Recording Thermome- 

 ter is of lamina metal, which, 

 besides being extremely sensitive 

 to temperature changes, is prac- 

 tically indestructible. Record 

 charts are furnished either daily 

 or weekly, and the whole mechanism 

 is contained In an attractive metal 

 case fitted, with lock and key, which 

 Insures the record from being tam- 

 pered with. 



The clock movement is of extremely 

 high grade; everything about the Instrument is up 

 to the highest possible standard of manufacture. 



STANDARD THERMOMETER CO. 



65 Shirley Street 



75-19 



BOSTON, MASS. 



Mention 'I'lif Kfvipw when you write. 



THE UNIVERSAL INVISIBLE PLANT STAKE 



^=51 



liefore StakliiR The Slaki- 



Patt^nt Applied for 



Alter .Staklnc 



This Cut Tells the Story 



1 just invented a stake 

 that is intended for all 

 kinds of plants, such as 

 Hyacinths, Tulips, Nar- 

 cissi, Cyclamens, Easter 

 Lilies, etc., etc., etc. 



No grower and no retailer 

 can afford to be without it. 

 It's a labor saver and im- 

 proves the appearance of 

 the plant, being invisible. 



Send for descriptive cir- 

 cular and prices, also a 

 sample, it's free. 



THE UNIVERSAL WIRE AND IRON WORKS, 



WAUWATOSA 

 WISCONSIN 



Mention The Review when you write. 



HYACINTH STAKES 



Hardwood, Green, Pointed 



1000 5000 lots 10,000 lots 



12-inch $1.55 $1.45 per 1000 $1.35 per 1000 



18-inch 2.10 2.00 per 1000 1.85 per 1000 



B. E. and J. T. COKELY 



Dependable Florist Supplies SCRANTON, PA. 



Mentidii The Keview when you write. 



TO AVOID TROUBLE- Use 



FISHER STEAM SPECIALTIES 



LOOK for our ad in Mar. 9 issue 

 FISHER GOVERNOR CO. 



Home Office -MARSHALLTOWN, lA. 



Branches in Principal Cities. 



Mention The Review when you write. 



Cokal Hand Stokers 

 SAVE COAL 



Ask us to send our combustion engineer 

 COKAL STOKER CORPORATION 



335 E. Ohio St. CHICAGO. ILL. 



Phone Superior 7701 



Mention The Review when you write. 



