Practical engineering drawing and third angle projection, for students in scientific, technical and manual training schools and for ... draughtsmen .. (1897)
Willson, Frederick Newton, 1855-1939 · Princeton, N.J., The author · leaf 20
14 THEORETICAL AXD PRACTICAL GRAPHICS. 39. To the above described—which we may call the ininimum set of instruments—might beadvantageously added a pair of bow-spacers (small dividers shaped like Fig. 24); beam-compasses,for extra large circles; parallel - rule ; proportional dividers, and an extra…
Mechanical drawing · Lettering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
