NOW READY.


Second and Enlarged Edition.


The Steel Square

AND ITS USES.


By FRED. T. HODGSON.


This is the only work on The Steel Square and Its Uses ever published. It is Thorough, Exhaustive, Clear, and Easily Understood. Confounding terms and scientific phrases have been religiously avoided where possible, and everything in the book has been made so plain that a boy twelve years of age, possessing ordinary intelligence, can understand it from end to end.