Teachers Hand book of Sljd As Practised And Taught At Ns Containing Expl
Teachers Hand book of Sljd As Practised And Taught At Ns Containing Expl
Otto Aron Salomon
The book Teachers Hand book of Sljd As Practised And Taught At Ns Containing Expl was written by author Otto Aron Salomon Here you can read free online of Teachers Hand book of Sljd As Practised And Taught At Ns Containing Expl book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Teachers Hand book of Sljd As Practised And Taught At Ns Containing Expl a good or bad book?
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This is not only essential for the operation just described, but also Fig. 27. Wooden Square. *. Because the square is used for testing solid angles, e. G. , the edge of a plank, a corner, etc. Every good collection of tools should include several squares of different sizes, e. G. , with blades 6, 8, 12, and 18 inches long. The square should be made of hard well-seasoned wood, warranted not to warp. To give greater durability the blade is often made of steel, and the wood of the stock faced wit...h brass on the inner side (Fig. 28). Still stronger and more trustworthy squares are made with steel blades and cast-iron stocks. Squares of Fig. 28. This kind are particularly useful as testing squares, and one ought to be included in every good collection of tools. To test a square. The blade is laid on the plane surface of a block of prepared wood, with the stock against a perfectly straight edge. Lines, drawn against each side of the blade, are then made on the wood. The square is next Wooden squares.
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