This book is one of the series ofHandbooks on industrial subjectsbeing published by the PopularMechanics Company.
Like Popular Mechanics Magazine,and like the other books in this series,it is "written so you can understand it."
The purpose of Popular MechanicsHandbooks is to supply a growingdemand for high-class, up-to-date andaccurate text-books, suitable for homestudy as well as for class use, on allmechanical subjects.
The text and illustrations, in eachinstance, have been prepared expresslyfor this series by well known experts,and revised by the editor of PopularMechanics.