92 



The Rorists' Review 



Fkbehaey 10, 1916. 



the generator. I would then, without 

 changing the expansion pipe, except to 

 put in a shut-oflf valve, connect the 

 generator with one of the returns, di- 

 rectly underneath the expansion tank, 

 and run the overflow from the genera- 

 tor up to the tank, connecting it at or . 

 near the bottom. 



If a given temperature can be main- 

 tained with an open-tank system when 

 the outside temperature is 20 degrees 

 below zero, there should be no serious 

 difficulty in securing the same tempera- 

 ture by using a mercury generator 

 when it is 40 degrees below zero. 



Many people have the mistaken idea 

 that a generator is so called because it 

 of ^ itself makes or generates heat, but 

 this is not the case. The generator 

 merely makes it possible to increase 

 the temperature of the water above the 

 normal boiling point and thus carry 

 more heat from the boiler through the 

 coils than would be possible with the 

 same size of pipe in an open-tank sys- 

 tem. To secure this heat, the boiler 

 should be as large as would be re- 

 quired to furnish the desired tempera- 

 ture with an open-tank system with 

 the same fuel and attention. It is pos- 

 sible that the boiler used by B. & C. 

 is too small. 



A EESERVE HEATING SYSTEM. 



Allow me to thank you for the an- 

 swer, in The Eeview of January 13, 

 to my inquiry with reference to ob- 

 taining a higher temperature in my 

 greenhouses. I stated that my present 

 piping would not maintain a tempera- 

 ture of more than 45 or 50 degrees in 

 zero weather, and that I wished to in- 

 crease this to 65 or 70 degrees. I also 

 asked ^whether one li4-inch flow and 

 four I-inch returns would be sufficient 

 for the extra radiation. 



I notice that I did not fully explain 

 the situation. The four greenhouses, 

 each 23%x90, run east and west. The 

 first house to the south has three feet 

 of glass under the gutter; the balance 

 is solid wall. The gables, however, are 

 all glazed and exposed, to within three 

 feet of the ground. The lean-to, 

 eighteen feet wide, is up against a 2- 

 story building. The heating system 

 used is an open hot water system. 1 

 am contemplating the use of low-pres- 

 sure steam for the additional heating, 

 though I did not state so in my pre- 

 vious communication. The new piping 

 will be a separate heating system from 

 the water system now installed. I sim- 

 ply wish to install a few extra pipes 

 to be used in severe weather, so as to 

 raise the temperature from 45 or 50 

 degrees in zero weather to 65 or 70 

 degrees. E. F. G.— 111. 



While one li/4-inch flow and four 1- 

 inch returns in the houses 23%x90 

 might raise the temperature from the 

 present point of 45 or 50 degrees to 

 65 or 70 degrees if the hot water plant 

 is crowded, we would prefer to put 

 in one 1%-inch flow and four li4-ineh 

 returns in each of the houses, except 

 the south house, with glass in the wall, 

 where we would rise five returns. In 

 the lean-to we would use one IVi-inch 

 flow and three li/4-inch or four 1-inch 

 returns. 



ISQUAREIDIRTIBANDS] 



See Ramsburg's display ad on page 97, and 

 nd postal for free samples. 



Mention The Review when you write. 



Plant Insurance at $5 



WHAT would happen if ^our night 

 man fell asleep some night in zero 

 weather? What if you should oversleep, 

 or a cold wave bit your greenhouse when 

 your heat is at the minimum? It would 

 mean ruin to your pJants— possibly ruin 

 to you. There have been many such 

 cases. 



But not if you are equipped with the 

 STANDARD THKRM08TAT. The 

 Standard • Tb«miostat protects you 

 from just such dangers. Itwillring a 

 bell at your bedside when danger is near. 



Tlie Standard Ttaenuostat is indis- 

 pensable to the up-to-date grower. You 

 know preparedness counts! Get the 

 Standard today. It costs only 16.00— 

 lasts a lifetime. Write for descriptive 

 matter now, while you are thinkingabout 

 it. (O. H. 4. same as G. H. 8. only under 

 lock and key, tlO.OO.) 



STANDARD THERNOHETER CO. 



65 Shirley Streat 



BOSTON. MASS. 



Use Rippley's 



No. 200 Hot Water Heater 



In greenhouses, garages, bag and 

 poultry houses, Bm&ll buildings. 

 Price, S36.60, freigh paid. 



Louis J. L. Amoureaux, Norton. 

 Mass., says: "Your No. 200 Heater 

 cared for our greenhouse, 75x14x9 

 ft., last winter at 23 below zero." 



Mall orders direct. Write for cir- 

 culars of heaters and steamer^. 



RIPPLEY MrC. & STEEL BOAT CO. 

 Box F, Qrafton, Illinois 



Mention The R«Tlew when yon wrttw. 



PIPE 



2c per ft. 



H. W. Botlers, 650-ft. size, $49.00. Flttlnars. 2c. 

 Valves, 38c. Cocks, 16c. Set Pipe Tools, $2.76. 

 Hose, 6c ft. Roofinar, 89c roil. Wrought Pipe at 

 factory prices. FREt; estimates. Everything at 

 wholesale, direct. Big catalogue free. Write tc^y. 



KING PIPE CO., 115W. 3rdSL, Gndnnati 



Mention The ReTlew when yon write. 



Pipe and Tubes 



ALL SIZKS 



Philadelphia Second Hand Pipe Supply 



1003 N. 7tii SL. PHIIADELPIIIA, PA. 



Mention The Rerlew when yon write. 



Guaranteed Sow Bug Killer 



EASILY APPLIED-A SURE KILLER 



1-lb. package $0.25 



5-lb. package 1.00 



10-lb. package 1.60 



Harmless to plants. 



WILLIS W. KINVON, Florist 

 SOUTH BEND, IND, 



Mention The Re'rlew when ypo write. 



ROCHELLE 



Try onr Paper Pots and Dirt Bands FREE). 

 Order what you want — try them according to our 

 Copyright Directions, and if not satisfactory ship ' 

 them back and we will refund your money. 

 Send postal for free Big Folder containing the 

 Experiences of 131 Florists and free samples. 

 Price list, page 101. F. W. Rochelle & Sons, 31 

 Main St., Chester, N. J. 

 Mention The Revl<>w when yon write. 



NICOTINE 40<^o 



QUARANTEED BY 



The GRASSELU CHEMICAL CO. 



OLEVELAMD NEW YORK CINCINNATI 



CHIOAOO MILWAUKEE ST. PAUL 



ST. LOUIS 



WRITE FOB PBICES 



Mention The Review when yon write. 



There is a Splendid Chapter on 



Greenhouse Heating 



IN 



THE FLORISTS' MANUAL 



By WILLIABI SCOTT 



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

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

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



FLORISTS' PUBLISHING CO. 



508 South Dearborn Street. CHICAGO 



