Jamison, Alpha Pierce. [from old catalog] · New York, J. Wiley & sons; · leaf 23
llel or perpen-dicular to one another; furthermore, two adjacent edges of thesame face are at right angles to each other, and opposite edgesare parallel; hence in the me hanical drawing of that face thetwo adjacent lines must form a right angle and opposite linesmust be parallel. From this it is… … Fig. 3.A Perspective Drawing. drawing of every face, or side, be constructed, for, in additionto the relation of the lines of an object, the faces of that objectbear a definite relation to one another. To depict the relationof the faces of an object they are referred to one face calledthe front…
Mechanical drawing
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