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A text-book of geometrical drawing, for the use of mechanics and schools, in which the definitions and rules of geometry are familiarly explained .. (1850)

Minifie, William, 1805-1880. [from old catalog] · Baltimore, W. Minifie & co. · leaf 43

An illustration from A text-book of geometrical drawing, for the use of mechanics and schools, in which the definitions and rules of geometry are familiarly explained .., 1850, leaf 43
the Hues for reducing the square to an octagon;the corners are again taken off, and finally finished with a toolappropriate to the purpose. The centre of each face of the octa-gon gives a line in the circumference of the circle, running thewhole length of the piece; and as there are eight of those… … /•>//. /

Mechanical drawing · Geometry, Descriptive · Perspective

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