Compton, Alfred G. (Alfred George), 1835-1913 · New York : J. Wiley & Sons · leaf 136
of brass is similar to that of cast- iron. The tool, however, may be thinner, and have a smaller angle, as already explained. It may also be wider (say 1"), as the same blow that will drive a narrow chisel through cast-iron wall drive a wider one in brass. For an exercise in brass-chipping, take… … edge, thus finding the corresponding point on the other base, and draw the inscribed circle. Start¬ ing from a, lay off chords equal to the radius, find¬ ing thus the points b, c, d , e,f. Draw the hexagon on each end of the piece. Connect the vertices aa and dd of the two hexagons, by lines drawn
Metal-work
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
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