 In 1909 , while working long hours on his definitive book on gear cutting machinery , his energy gave out and he suffered a “ nervous breakdown . ” He had to take time off to recover . In 1910 , he accepted a job offer to work in a machine tool company in Vermont . He continued to write on technical and other matters throughout his life and would develop a broader philosophy of the role of industry in society . In 1938 , he received a Worcester Reed Warner Medal in recognition for his technical writing . 
