Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 59
o made with pencil points (Fig. 128). Border - pens (Fig.129), for drawing broadlines, are double penswith an intermediateblade, and are applicableto the drawing of map-borders. The same workmay be done by drawingheavy outer lines withthe common drawing-pen, and filling in with abrush or… … Fig. 128. Fig. 129. Fig. 130. pen to revolve, and thus more easily follow the curve,with two pens (Fig. 131), is called a railroad cnrve-pen DRAWING INSTRUMENTS. 43 The dotting-peii (Fig. 132) has on the back blade a pivot, on which may beplaced a dotting-wheel, resembling the rowel of a spur ; the…
Mechanical drawing
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