Blessing, George F. (George Frederick), 1875-1921, Darling, Lewis A. (Lewis Andrew) · New York, J. Wiley & sons; [etc., etc.] · leaf 53
32 ELEMENTS OF DRAWING angle with the given Hne, use a cone-pointed pencil (see page 15,§ 14) and mark a very fine point on the drawing just at theouter edge of the protractor and opposite the desired angle-division on the scale, and a line drawn through this point andthe point C will make the… … 29. Machinists Calipers, Dividers, and Steel Rule. To makea drawing of any existing object, for example a machine, all ofthe principal dimensions must be obtained. These measure-ments should always be made with a two-foot rule or a ma-chinists steel rule and not with the draftsmans scale. Applythe…
Mechanical drawing
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