A Practical Treatise on the Steel Square and Its Application to Everyday Use #268909

Before entering into the more serious part of the subject under consideration I purpose giving a description of a number of squares that are now in the market, along with the manufac turer's directions for their use, and further, I also intend to illustrate and describe some of the charts, diagrams, keys and rules that have lately been devised, for the purpose of assisting the student in understanding the application of the square for the solving of roof and other problems.