Jamison, Alpha Pierce. [from old catalog] · New York, J. Wiley & sons; · leaf 93
g theplan is below the elevation. Now assume the object to be trans-ferred to the third quadrant as in Fig. 32 and here (Fig. 31) theplan is above the elevation; hence- when the plan of an objectis drawn above the elevation the object is assumed to be situ-ated in the third quadrant and the drawing… … 85. Isometric Projection.—In the orthographic projectionstreated of thus far the objects projected have been so situatedrelative to the planes of projection as to project but one face ofthe object on each plane, and this is the usual practice. It is,however, often desirable to project two or more…
Mechanical drawing
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