Cyclopedia of mechanical engineering; a general reference work. Editor-in-chief Howard Monroe Raymond. Assisted by a corps of mechanical engineers, technical experts, and designers of the highest professional standing (1908)
American School (Chicago, Ill.), Raymond, Howard Monroe · Chicago American Technical Society · leaf 158
the circle. AVhen this is done a definite point exists forthe needle point of the compasses. If the circle is drawn first theneedle point may not be placed accurately at the center on thepencil drawing beneath, and the location be thrown out. Likewise the principal center lines of pieces, the lines… … MECHANICAL DRAWING. &9 arc cases where, it is easier to run the arcs into the straight linesthan to match the straight lines to the arcs. Thej^ are exceptions,liowevei, and can be judged only as the case arises. Straight lines, horizontal and vertical, should be iidced withthe T-square and…
Mechanical engineering
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