vi PREFACE 



Therefore, the study of the application of the scientific prin- 

 ciples underlying modern industry is worthy to be treated as 

 a special subject. 



The author believes that there is a place for the traditional 

 course in chemistry, physics, and biology in the regular high 

 school, in addition to the first-year science course. He also 

 believes that there is a type of mind in our intermediate and 

 secondary schools that can profit by the study of the prin- 

 ciples of science underlying the fundamental trades. A 

 course of this kind should develop in a boy's mind that 

 attitude of alertness toward theory on which all sound prac- 

 tice is based a mental attitude which will be valuable to all 

 manual workers, and particularly to those who are to enter 

 the distributive or productive spheres of industry. Hence 

 the title of this book, t Applied Science for Wood-Workers " 

 the purpose of which is to provide an elementary course in 

 applied science for the wood-working trades. 



The author wishes to express his thanks to the following 

 firms who have furnished cuts and information: Dodge 

 Sales and Engineering Company, The Lincoln Electric Com- 

 pany, The American Injector Company, Brown and Sharpe 

 Manufacturing Company, Tolhurst Machine Works, Novo 

 Engine Company, Bailey Meter Company, Nicholson File 

 Company, The Bigelow Company, Ingersoll-Rand Company, 

 Babcock and Wilcox Company, American Steam Gauge and 

 Valve Manufacturing Company, Henry Disston and Sons, 

 Inc., The L. S. Starrett Company, Norton Company, Millers 

 Falls Company, Watson-Stillman Company, American 

 Radiator Company, Whitall Tatum Company, Eberhard 

 Faber, United States Department of Agriculture, Ameri- 

 can Screw Company, Edison Storage Battery Company, 

 Independent Pneumatic Tool Company, National Lead 



