Blueprint reading; a practical manual of instruction in blueprint reading through the analysis of typical plates with reference to mechanical drawing conventions and methods, the laws of projection, etc (1919)
Fairfield, Howard Parker, 1858-, Kenison, Ervin, Waite, Edward B. (Edward Broughton), 1873-, American Technical Society · Chicago, American technical society · leaf 154
. Place the longest side of triangle A sothat it coincides with the line E F. Place the other triangle (or anystraight-edge) in the position of the triangle B; then holding B withthe left hand, place the triangle A in the position C, so that the longestside passes through the point D. A line may… … o o -^ -—-_ - o o Fig. 14. Drawing a Line Parallel to aGiven. Line Fig. 15. Drawing a Line Perpendicularto a Given Line It is possible to draw lines forming angles of 15 and 75 degrees byplacing the triangles as shown in Fig. 16.
Mechanical drawing · Blueprinting
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
