Rogers' drawing and design; an educational treatise relating to linear drawing; machine design; working drawings; transmission methods; steam, electrical and metal working machines and parts; lathes; boiler and parts; instruments and their use; tables, etc (1913)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 385
itsdifferent edges as follows : O (a) 3 inches and 13^ inches toone foot, I inch and 3^inch to one foot, (b) Y^inch and 2/^ inch to onefoot, i^ inch and y% inchto one foot and (c) oneedge reads sixteenthsthe whole 12 inches ofits length. PROTRACTOR. A protractor x?, shown in Fig. 596 ; it is an… … The outer edge of the protractor is a semicircle,with center at O and, for convenience, is dividedinto 180 equal parts or degrees from A to B andfrom B to A. Protractors are often made of metal,in which case the central part is cut away to allowthe drawing under it to be seen. When using the…
Mechanical drawing · Machine design
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
