Kenison, Ervin, Gardner, Harry W, Lawrence, William Henry, 1868-, Everett, Herbert E. (Herbert Edward), 1863-1932, Gregg, D. A. (David A.), Von Holst, H. V. (Hermann Valentin), 1874-1955, Brown, Frank Chouteau, 1876-1947, Griffin, Charles Lewis, 1867-, Neubecker, William, 1864-, Zapf, Alfred E, American School (Lansing, Ill.) · Chicago, Ill. : [American School of Correspondence] · leaf 18
MECHANICAL DRAWING. 8 board only, and if this edge of the board is straight, the lines drawn with the T-square will be parallel to each other. The T- square should never be used except with the left-hand edge of the board, as it is almost impossible to find a drawing broad with the edges parallel… … Fig. 5. other which are not at right angles to the left-hand edge of the board. This form of T-square is similar to the ordinary T-square already described, but the head is swiveled so that it may be clamped at any desired angle. The ordinary T-square as shown in Figs. 4 and 5 is, how ever, adapted…
Mechanical drawing
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