A practical course in mechanical drawing for individual study and shop classes, trade and high schools (1912)
Willard, William Franklin, 1879- · Chicago : Popular mechanics company · leaf 16
bowspring compass (pencil). I box leads. 1 protractor (German make preferable). I penholder and pen. No. 506 and No. 516, ball-pointed. MECHANICAL DRAWING 13 *i bottle Higgins water-proof ink (black). 1 typewriter erasing-shield (celluloid or nickel-plated). These instruments, including the paper,… … Case of InstrumentsHOW TO USE THE MATERIALS 1. The paper should be tacked in the upper left-hand corner of the drawing-board so that the T squaremay not slip when drawing the lowest lines on theplate. 2. Thumb-tacks should not be withdrawn by thefingers. Use a knife blade or other flat instrument.…
Mechanical drawing
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