Mechanical drawing. Elementary and advanced (1910)
Reid, John S. (John Simpson), 1856- · New York, J. Wiley & sons; [etc, etc.] · leaf 125
iced that the lines grow a little narrower tothe right of the line of shade on Fig. 150; this shows where no MECHANICAL DRAWING. the reflection of the rays of light partly illumine the outlineof the cylinder. Prob. 26, Fig. 148.—To shade a right cone with gradedright lines tapering toward the apex…