Detroit. Public schools. Dept. of instruction, teacher training and research. [from old catalog], Kepler, Frank Roy. [from old catalog] · Detroit · leaf 21
ugh a cylinder so as to contain the axis willintersect the surface in two straight lines parallel to the axis.Since these two lines are parallel to the axis and therefore toeach other, they are right line elements on the curved surface.Fig. 22. Again a plane may be passed through a cylinder 20… … p*-^ -.^ ^> i.Liw:::: 5 fcV. V L^ii-: 01 •v:!.: ^ <<>
Projection
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