Elementary mechanical drawing, for school and shop (1886)
Aborn, Frank, 1845- [from old catalog] · Cincinnati, New York, Van Antwerp, Bragg & co · leaf 12
thoroughly reliable in every way for school work.If, however, one wishes to have something better than this, there is noth-ing in the market, thatit is economy to buy, ata less cost than threedollars; and a set of in-struments at this priceshould consist only of a pair of dividers,… … DRAUGHTING TOOLS. 11 T-Square. A T-Square is an instrument, usuallymade of wood, consisting of a bladeand head at right angles to each other(Fig. 3). For school purposes, a T-square shouldhave a blade not more than twelveinches in length. Head Fig. 3.
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
