43 2 FARM MOTORS 



and the former when muffling effectively generally cause 

 back pressure and consequently loss of power. The most 

 satisfactory method of reducing this noise is to pipe the 

 exhaust into a pit, old well, or smoke stack. The top of 

 the pit or well should be closed, with the exception of 

 three or four openings the size of the exhaust pipe. 



577. Setting. To insure a smooth-running gasoline 

 engine, the setting is a very important point. Fastening 

 to the ground by means of stakes and skids or to a floor 

 by means of lag screws are makeshift methods. A ma- 

 sonry foundation with well-set anchor bolts is by all 

 means advisable. Well-laid concrete is the best and gen- 

 erally the cheapest. The foundation at the bottom should 

 be about twice the length of the base of the engine and 

 a little more than twice the width. For an engine of 5 

 to 12 horse power it should be from 3 to 4 feet deep, and 

 for larger sized engines from 5 to 6. The sides should 

 be battered until they are about 8 inches wider at the 

 top than the engine. The jar is to a certain extent broken 

 by having heavy planking between the masonry and the 

 engine. To set and hold the anchor bolts in position, a 

 templet should be made which contains holes correspond- 

 ing exactly to those in the engine bed. The templet 

 should be made strong and firm. The bolts need a heavy 

 washer or plate at the lower end and should be passed 

 up through a pipe which has an inside diameter of not 

 less than I inch. This gives a chance for variation in 

 setting. 



578. Advantages of the gasoline engine as a farm 

 motor. The gasoline engine has many advantages over 

 the steam engine. In the first place, the farmer as a rule 

 uses power for short intervals. The gasoline engine is. 

 always ready to start, and when the run is over there is 

 no fuel in the fire box to be wasted. It does not reouire 



