36 



THE BEE-KEEPERS' REVIEW 



1 1-2 H. P. Hopper- Cooled National Engine 



General Description 



In 



design Xational Engines have all 

 the strengtli needed to withstand con- 

 tinuous liaid work. Every worlving 

 strain is properly provided for. 



The Cylinder is made of semi-steel, 

 Koted for its remarkable strength and 

 density. Every hopper cooled cylinder is 

 given a special hign pressure water test 

 to guard against leaks in the cylinder 

 walls or jacket. The water space is 

 exceptionally wide and a drain at the 

 bottom of the cylinder allows water to 

 y>e taken out wiien necessary. 



The Crank Shaft is a steel drop 

 forging of the best quality, accurately 

 finished by grinding. 



The Connecting Rod is of malleable 

 iron and has an automatic lubricating 

 method. This takes care of the bear- 

 ings on both ends from the waste cyl- 

 inder oil — a saving of 

 trouble. 



The Piston is ground 

 finish and i as automatic 

 1 le wrist pin bearing. 



The Piston lUng.s. three in 

 are eccentiic and lap jointed, 

 the most perfect ring liuown. 

 ground like the piston. 



The Governor is of simplest design, 

 hit and miss, absolutely reliable and 

 economical in its regulation of fuel 

 consumption according to load. 



The Fly Wheels — Smooth running in 

 an engine, especially on truck, depends 



expense and 



to a mirror 

 lubrication for 



number. 



This is 



They are 



... the fly wheels. National Engines 

 have fly wheels that are accurately 

 tui'ned and properly balanced. The en- 

 gines will run steady without blocking 

 the truck wheels. 



The Mixer is our famous design with 

 botii needle valve and air shutter reg- 

 ulation. These adjustments enable the 

 user to secure uniform results under 

 varying loads. 



Lubrication is ample throughout — a 

 sight feed oiler on the cylinder and 

 automatic lubrication on the connecting 

 rod. The crank bearings have hard 

 oilers. 



Ignition is either make and break or 

 lump spark. Each kind is of tlie simp- 

 lest character and perfect in adjustment 

 when the engine leaves the factory. 



National Engines are shipped ready 

 to iT.n after careful tests at the fac- 

 tory. Unless damaged in transit the 

 engine will be ready for work as soon 

 as uncrated and supplied with fuel and 

 lubricating oil. 



Hoise po\\er, ] i/o : bore, 3%; stroke 

 4V2: speed P. P. M., 500; fly wheels, 

 diameter IR, v ''ight 37; crank shaft di- 

 ameter, 1%; floor space, 9x36; shipping 

 v,-eight 200. 



ITand Trucks, $4.50 extra. 



Larger sizes a matter of correspond- 

 ence. 



Price $32.50, Co-operative. 



Address all orders to the Xnt;on.il 

 Beekeepers' Ass'n., Northstr.r, Michi- 

 gan. 



Members who want to use some of those little 

 cuts, either those reading "EAT MORE HONEY" 

 or "KEEP MORE BEES," or cut without 

 reading for their letter heads, envelopes or 

 circulars can be furnished with them for 50c 

 each, postpaid. Address 



THE BEE-KEEPERS' REVIEW, 

 Northstar, Michigan. 



