154 



THE BEE-KEEPERS' REVIEW 



\]/2 H. P. Hopper-Cooled N?itional Engine 



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NATIONAL 



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General Description 



In design, National Engines have all 

 the strength needed to withstand con- 

 tinuous hard work. Every working 

 strain is properly provided for. 



The Cylinder is made of semi-steel, 

 noted for its remarkable strength and 

 density. Every hopper cooled cylin- 

 der is given a special high 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 be taken out when 

 necessary. 



The Crank Shaft is a steel drop 

 forging of best quality, accurately fin- 

 ished 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 expense and 

 trouble. 



The Piston is ground to a mirror 

 finish and has automatic lubrication 

 for the wrist pin bearing. 



The Piston Rings, three in number, 

 are eccentric and lap jointed. This is 

 the most perfect ring known. They 

 are ground like t^e 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 



on the fly wheels. National Engines 

 have fly wheels that are accurately 

 turned and properly balanced. The 

 engines will run steady without block- 

 ing the truck wheels. 



The Mixer is our famous design with 

 both 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 connect- 

 ing rod. The crank bearings have 

 hard oilers. 



Ignition is either make and break 

 or jump spark. Each kind is of the 

 simplest character and perfect in ad- 

 justment when the engine leaves the 

 factory. 



National Engines are shipped ready 

 to run 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. 



Horse power, 1%; bore, 3^4; stroke, 

 41/2; speed R. P. M., 500; fly wheels, 

 diameter 16, weight 37; crank shaft di- 

 ameter, IV4,', floor space, 9x36; shipping 

 weight, 290. 



Hand Trucks, $4. .50 extra. 



Larger sizes a matter of correspond- 

 ence. 



Price $32.50, Co-operative. 



Address all orders to the National 

 Beekeepers' Ass'n., Northstar, Michi- 

 gan. 



Members who want to use some of those 

 little cuts, either those reading "EAT MORE 

 HONEY" or "KEEP MORE BEES.' for 

 their letter heads, envelopes or circulars, can 

 be furnished with them for oOc. each, post- 

 Daid. Address 



i- » 



The Bee-Keepers' Review, 



Northstar, Michigan. 



