106 SCIENCE OF SUCCESSFUL THRESHING. 



(thirty-seven inches). Divide this product by the distance 

 of the front axle of the engine from the rear axle of the 

 engine. The numbers must be in inches in every case and 

 the quotient so obtained will be the distance the chains should 

 be apart on the front axle of the engine. If it be impossible 

 to put them the required distance apart on the engine axle, 

 assume some distance between the connections on the tender 

 axle and figure it again, substituting the assumed distance. 

 To find the diameter of the wheels for the tender, subtract 

 eleven from the number of inches the engine draw-eye is 

 from the ground and multiply the remainder by two ; the 

 product will be the required diameter, in inches, of the tender 

 wheels. Three sizes of wheels are furnished, thirty inch, 

 thirty-four inch and forty-two inch. The parts necessary 

 to attach the tender to "Case" center-crank engines can also 

 be furnished. 



