Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 20
rulers or compasses, representing thedirections of brooks and rivers, the margins of lakes and seas, points in whichare established by surveys, defined on paper, and connected by hand-drawing,are irregular or crooked lines. Where it is necessary to distinguish lines by names, we place at their… … Fig. 4.
Mechanical drawing
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