PREFA 



In placing this book before the public the author wishes 



it understood that it is not his intention to produce a 



tine work on engineering. Such a book would be 



ible only to engineers of large stationary engines. 



nice engine room nice theories and scientific calcula- 



are practical. This book is intended for engineers of 



farm and traction engines, "rough and tumble engineers," 



have everything in their favor today, and tomorrow 



are 3 ho with the same engine do eight 



horse work one day and sixteen horse work the next day. 



:er, the author has had all these experiences and you 



will have them, but don't get discouraged. You can get 



through them to your entire satisfaction. 



Don't conclude that all you need to do is to read this 

 book. It will not make an engineer of you. But read 

 it carefully, use good judgment and common sense, do 

 as it tells you, and my word for it. in one month, you, for 

 all practical purposes, will be a better engineer than four- 

 fifths of the so-called engineers today, who think what 

 they don't know would not ciake much of a book. 



