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H O R T I C U L T U R i: 



January 19, 1907 



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TheDust Proof Gear 

 — KoAv It's Made— 



-And Why- 



WE are everlastingly getting after the points that 

 can be improved in every sort of thing that 

 leaves our shops — we have men who do nothing but 

 dig out just these things — you might call them the 

 " watch dogs of the factory" — nothing gets by them. 

 Of course, it often takes weeks, months and some- 

 times even a year to bring about certain improvements 

 and test them up, and testing them up is the really 

 vital part of every improvement we make. It comes 

 to you as a tried out fact — nor a theory. Take for ex- 

 ample this new dust-proof gear; we have used the 

 mighty good points in our self oiling one and carried 

 them out in a little different way. The gears are now 

 entirely enclosed and thoroughly protected; the en- 

 closure cap is removable. The gears run just the 

 same in reservoirs of oil, but the operating rod runs 

 down inside the columns, making a more compact and 

 neater job. If you are using a ventilating apparatus, 

 that your men have to tug at when there's a sudden 

 change of temperature, or a storm is on hand, then 

 you want this gear — one good turn of the handle and 

 it will run down itself. It's not a rough cast affair, 

 but a fine piece of workmanship in every way, with 

 machine cut worm and all that kind of thing. Remem- 

 ber this apparatus has no criss-crossing of levers — no 

 slipping, breaking cables — no complicated chain and 

 sprocket, but a splendid apparatus free from compli- 

 cations, and it will do the work the way you want the 

 work done. Write for prices. 



Extract from a recent report of an important firm of Contracting 

 Engineers, concerning the merits of a ventilating apparatus (ontrollcil 

 liy a rod against one operated by a chain or sprocket. 



" The device depends for its operation on a chain running 



over a sprocketed gear, and investigation of these devices convinces 

 us that they are not nearly so reliable as a worm and gear arrange- 

 ment controlled by a rod, such for instance as the devices made by 

 Lord it Burnham Company. The one great fault in a chain operat- 

 ing device is the constant recurring troubles at top of sprocketed gear. 

 .Sometimes a link parts and at others it gets jammed in the mechan- 

 ism and the difficulty of getting up lo so high an elevation seems to 

 us to be sufficient reason for an additional expenditure." 



[.Signed] WESTWATER & CASEY, Columbus, Ohio. 



LORD <a BURNHAM CO. 



Greenhouse Designers and Manufacturers 



1133 BROADWAY, cor. 26th Street, N. Y. 

 BOSTON Branch : 819 Tremont Building 



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