Jamoaby 28. 1915. 



The Florists^ Review 



113 



This simple little Chinese puzzle has to 

 do with the load of the roof exerted on 

 the rafter at a certain point. 



How We Make Sure 



No. this is not a kite, but a diagram 

 of the capeVs the wind cuts up waen 

 it startd pushing on the roof. 



Our Roofs Are Safe and Sure 



UT'S EASY ENOUGH to say that if a piece of Iron of a 

 certain size and strength will support a load of so many 

 pounds, one twice the size would support twice the 

 load. That's good enough as far as it goes — but it doesn't 

 go far enough when it comes to greenhouse construction. 

 It doesn't, because with every foot In width that you add 

 to a bouse you shift the load. It may increase the load by 

 three nt some points and decrease it by a half at others. 

 You absolutely must know to a pound — almost to an ounce 

 — Just 



How much the weight of the frame itself will 



be; 

 How much the wind pressure will be ; 

 How much the snow pressure of an estimated 



given amount will be ; 

 How and where the pressure will be shifted 



from one member to another ; 

 How much margin should be figured in for a 

 '.'safety factor ' In the allowing of a surplus 

 of strength for extraordinary conditions of 

 snow and blow. 

 You must know not only the weight and pres- 

 sure exerted on the entire structure, but ex- 

 actly what the weight and strain will be at 

 any point. 



(1) 



(2) 

 (3) 



(4) 



(5) 



(6) 



These are things that can't be figured out on tA back of 

 an envelope "while you wait." It takes days, iSmetimes 

 even weeks, to do It. But we never materially increase the 

 width of our houses or make any radical change in our con- 

 struction without first having our engineering department 

 figure out stress and strain diagrams, like these shown here. 

 Tnese particular ones were worked out to prove to ourselves 

 that we could safely build a bouse 83 feet wide and use 

 only two columns. 



These diagrams proved beyond all doubt that It was a safe 

 and sure proposition ; but they also showed to us that it was 

 possible to greatly simplify our first construction design, 

 making the house more desirable in every way and reducing 

 its cost considerably. It took our engineering department 

 over two weeks, working steadily, to reach these conclusions. 

 How, then, any other than a highly trained greenhouse en- 

 gineer can be depended on to flgrure safe on the engineering 

 problems Involved in big greenhouse building is more than 

 we can understand; or how even a skilled engineer can han- 

 dle it without the aid of information and data only such as 

 can possibly be found in the possession of a greenhouse con- 

 cern of years and years of experience, like Lord & Burnham. 



When you want to build a safe and sure bouse, be It big 

 or little, let's talk It over together. Say when and where 

 and we'll be there. 



|ofd^ 6Riiniham|Q. 



SALC« OPFICKS 



PACTORICS 



NEW TORE BOSTON PHIIiADEt,PHlA OUIOAOO ROCHESTER OLEV BLAND TORONTO IRVINOTON, N. Y. 



42d Street Bide. _Tr«mont Bid*. FrankUn Bank Bld«r. Rookery Bld^.^Oranlte BIdff. Swetland Bid«. Royal Bank Bid?. DES PLAINE8. ILL. 



MMiitlnn Thp H*»|pw «h«>n Tmi «rr(t<». 



277^0 MORE 

 BLOSSOMS 



on piaiiiH raised In 4-Inch SQUARE paper 

 pots (04 cubic Inches of soil and roots) than 

 on plants raised In 4-lnch clay pots (31 cubic 

 Inches of BotI and roots). 



1st — See our page advt. on page 105. 



2nd — Send for FREE Samples of Our 

 Square Paper Pots and Dirt Bands and Big 

 FolUer giving 54 EXPERIENCES of Florists 

 nd Market Gardeners. 



.W.fcOCHELLE&SONS,'»^N^5" 



UMltlon The UeTiew wben you write. 



GREENHOUSE CLAY Till BENCHES 



are beins ased by the leadinc Floriits all 

 over the country. Our Benchei last a life* 

 time. Write today for dicnlan and prices. 



CANP CONDUIT CO., Oe? dud, OUi 



MeatloD The Review wben yoa writ*. 



1866-1916 



"ALL-HEART" CYPRESS 



WORKED TO SHAPES 

 HOTBED SASH 

 PECKY CYPRESS 

 SQUARE REDJ CEDAR POSTS 



GREENHOUSE 

 LUMBER 



LOCKLAND LUMBER CO., Lockland, O. 



Aleutluu The Keview wliyu yuu write. 



GARDEN CITY SAND CO. 



dMnbcr of Conmcrce Bidg., CHICAGO 



Phones Main 4827; Auto. 38-304 



BuildiBf* and Vropmga,ting Sanda 



Firs Brlek and Fire Clay. Portland Cement, 

 Stonekote. Hard Wall Plaster 



K. T W. Dftmp-raalstliur Pmint 



Mention The Renew i^hen yoa writ*. 



CYPRESS BENCH BOARDS 



Small orders cheerfully shipp«>d from Phila- 

 delphia yard. Carload shipments direct from 

 mill in the south. 



Send us your inauiries. 



STOKES BROTHERS CO., Inc. 



30th St., below Chestnut, Philadelphia, Pa. 

 Mention Tbe Berlew when 70a write. 



