Don't deceive yourself with the idea that what you get 

 out of this will be merely "book learning." What is said 

 in this will be plain, unvarnished, practical facts. It is 

 not the author's intention to use any scientific terms, but 

 plain everyday field talk. There will be a number of 

 things you will not find in this book, but nothing will be 

 left out that would be of practical value to you. 

 will not find any geometrical figures made up of circles, 

 curves, angles, letters and figures in a vain effort to make 

 you understand the principle of an eccentric. While it 

 is all very nice to know tfiese things, it is not necessary, 

 and the putting of them in this book would defeat the 

 very object for which it was intended. Be content with 

 being a good, practical, everyday engineer, and all these 

 things will come in time. 



