130 



The Florists^ Review 



November 23, 1920 



C. M. MODERWELL & CO 



Harrison 725 



1058 McCormick Building 

 CHICAGO, ILL. 



If you want COAL, get in touch with' us. 

 We can give quality and prompt service. 



Mention Tlie Review when you write. 



not exceeding forty-eight inches in 

 length should be arranged to shake in 

 two sections. Grates forty-eight inches 

 wide and longer than four feet should 

 be arranged to shake in four sections 

 and for large boiler units we recommend 

 shaking grates with rear dump facilities. 



Pipe lines, connections and valves 

 should be kept thoroughly tight. Heat- 

 distributing pipe lines should be of 

 proper area for the work intended. I 

 shall not attempt to go into details in 

 regard to various pipe sizes and connec- 

 tions and other pipe requirements. 



There is, at this time, at least one 

 device I wish to point out in connec- 

 tion witli higli-prcssuro steam installa- 

 tions, and that is the advisability of in- 

 stalling stop check valves. 



When two or more high-pressure steam 

 boilers are connected to a common 

 header, each boiler should be constructed 

 with a stop check valve. As a safety 

 first measure, this is a necessity; in 

 fact, many city and state laws and in- 

 surance requirements demand it. 



Valves Regulate Steam. 



Stop and check valves regulate the 

 flow of si cam from boilers and headers, 

 so that in firing each boiler maintains 

 the proper pressure. Should one boiler, 

 owing to incorrect firing, etc., drop in 

 pressure, the stop and check valve will 

 cut out this particular boiler until it 

 reaches the correct pressure. Each 

 boiler must supply its quota of steam 

 and this means increased efficiency. 



For large cstablishmeiits high-prcs- 

 sure steam and vacuum systems are 

 preferable. For plant growing and veg- 

 etable ranges, hot water is extensively 

 used. Each system has its advantages. 

 There are many vegetable ranges over 

 500,000 square feet of glass area which 

 are successfully heated by hot water 

 forced circulation. 



Generally, hot water is advisable for 

 the medium-sized establisliment, except 

 where roses arc grown. There are many 

 large ranges of glass heated by hot 

 water in this country and this accounts 

 for the necessity of big hot water units 

 shown by us at mnny of the national 

 conventions. 



Of late years the self-contained water 

 tube steam heating unit has come to the 

 front. This type of boiler is most desir- 

 able for ranges requiring boiler capaci- 

 ties of 100 horsepower or less. For 

 largo establishments, the l.jO-horse- 

 power horizontal return tubular boiler 

 is considered the most practical. For 

 the big ranges covering half a million 



What Prominent Growers Think 

 About the Standard Recording Thermometer 



Erie, Pa., Dec. 16, 1919. 

 "Please send us another of those ther- 

 mometer clocks, just like the one you 

 sent us about two weeks ago. We 

 would never be without one again." 



Trost & Steinl'urth. 



The actuating element of the Standard Record- 

 ing Thermometer is of lamina metal, which, be- 

 sides being extremely sensitive to temperature 

 changes, is practicallr indestructible. Record 

 charts are furnished eith r daily or weekly, and 

 the whole mechanism iac ntained in an attractive 

 metal case fitted with lock and key, which insures 

 the record from being tampered with. 



The clock movement is of extremely high grade; 

 everything about the instrument is up to the high- 

 est possible standard of manufacture. 



STANDARD THERMOMETER COMPANY 



6S Shirley Street, -5-19 BOSTON, MASS. 



ORDER NOW 

 $40.00 



TUBING, ALL SIZES 



PIPE CUT TO SKETCH 



SECOND HAND PIPE 



Large stock, all sizes, furnished with new threads and couplings. 



416-24 Moyer Street, 



PHILADELPHIA, PA. 



JAMES F. GRIFFITH, 



Union Grate 



A Rocking Grate that Saves Coal 



Write for catalogue and prices 



MARTIN GRATE CO., 



343 S. Dearborn St. 

 CHICAGO 



ESTABLISHED 1857 



S. WILKS MFG. COMPANY 



Manufacturers of 



WILKS HOT WATER BOILERS 



FOR GREENHOUSE HEATING 

 3517-3539 Shields Ave., CHICAGO, ILL. 



A GOOD BOOK FREE 



"THE FISHER TRAP" 



Write for it-NOW. 



FISHER GOVERNOR CO., 



MARSHALLTOWN, IOWA. 



Agencies in 11 principal citie-'. 



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BOILER FLUES 



We make a specialty of handling 

 carefully selected Boiler Flues, 4 

 Inches In diameter and other sizes 

 for Retabintr Boilers. Also 

 Flues for greenhouse piping, etc. 



All flues are thoroughly cleaned 

 Inside and out, trimmed and are 

 ready for use. General sales agent 

 for Stuttle's Pat<?nt Clamp and El- 

 bow for Joining flues— no packing, 

 no leaks. New Standard Pipe and 

 all kinds of Greenhouse Fittings. 

 Klgfatprlcesand promptshipment. 

 H. aiUNSON 



Est. 1898 Phone Superior B72 

 1483 M. Wells St.. Chioaeo 



If 



aic 



4^ 



PIPE 



Wrousht Iron of lonnd leoond-haud aualiti 

 with new threads and couvlinc, l6-ft. leasthi 

 and up. Alio phM cut to sketch. We cnanntsi 

 entire satisfaction or return money. 



ALSO NSW PIPK AND FITTINGS 



Pfaff & Kendan^r.'!::^^'?. Newark, N. J. 



