Mechanical drawing. Projection drawing. Isometric and oblique drawing. Working drawings. A condensed text for class room use (1894)
Palmer, Walter Keifer · Columbus, O., C. B. Palmer · leaf 18
any line, or surface, or solid, may befound by finding- the projections of all of its points.For lines and surfaces are but successions of points,and solids are bounded by surfaces. APPLICATION OF PROj:eCTION TO DRAWING. 14. Now consider two mathematical planes of in-definite extent, intersecting-… … f to ur-e §. Let the vertical plane be denoted by Fand the hori-zontal plane by //, and their line of intersection by GL. 15. Now imagine a point to be situated in space inone of the ang-les of these two planes, as shown in Fig-. 4 :
Mechanical drawing
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