Spanton, J. Humphrey (John Humphrey) · London, Macmillan and Co., Limited; New York, The Macmillan Company · leaf 140
itions, with their relative proportions, to a given scale. Let us take somefamiliar object, adressing-case for in-stance, ABDC, Fig.243, and having pro-cured a stiff pieceof drawing-paperHKLM, fold it in aline at X, parallel toone of its edges ;then open it at a right angle, so that HX will… … INTRODUCTION. 127 the two planes intersect each other, and is generally expressedby the letters X and Y, one at each end. Having placed the dressing-case on the horizontal plane,with its back parallel to the vertical plane, let us take a penciland trace its position on the jj g- horizontal plane by…
Geometrical drawing · Design · Drawing
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