Detroit. Public schools. Dept. of instruction, teacher training and research. [from old catalog], Kepler, Frank Roy. [from old catalog] · Detroit · leaf 21
p*-^ -.^ ^> i.Liw:::: 5 fcV. V L^ii-: 01 •v:!.: ^ <<> … Right line elements, then, may be found on the surface ofa cyUnder in two ways: (1) By passing a plane through thecylinder parallel to the axis; or, (2), By passing a planethrough the axis in any direction so that the axis is containedin the plane. Fig. 24 readily illustrates the method of…
Projection
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