4 A B C OF THE STEEL SQUARE 



make them in everything that pertains to ac- 

 curacy, durability and general finish. The 

 American workman should feel proud of the 

 fact that he possesses a Steel Square of purely 

 Home production which has no equal in the 

 world. 



There is nothing of more importance to a 

 young man who is learning the business of 

 house-joinery and carpentry, than that he 

 should make himself thoroughly conversant 

 with the capabilities of the tools he employs. 

 It may be that, in some of the rules shown in 

 this work, the result could be attained much 

 readier with other aids than the square; but 

 the progressive mechanic will not rest satisfied 

 with one method of performing operations when 

 others are witKin his reach. 



In the hand of the intelligent mechanic the 

 square becomes a simple calculating machine of 

 the most wonderful capacity, and by it he solves 

 problems of the kinds continually arising ii 

 mechanical work, which by the ordinary meth- 

 ods are more difficult to perform. 



The great improvement which the arts and 

 manufactures, have attained within the last fifty 

 years, renders it essential that every person en- 

 gaged therein should use his utmost exertions 

 to obtain a perfect knowledge of the trade he 



