How to teach paper-folding and cutting: a practical manual-training aid (1892)
[Litchfield, Norma MacLeod] [from old catalog] · Lebanon, Ohio, March brothers · leaf 97
R.-Nc/ef^- face of a frustum is the same shape as the base of thepyramid, but, as a matter of course, is smaller. The 94 PAPER-FOLDING AND CUTTING. nearer the top of the pyramid the cutting is made,the smaller is the upper face. By examining thediagram shown in figure No. 137 you will see… … /T^ K. /c// ing and pasting. Proceed as if to draw a pyramid.Draw an arc the distance from the vertex that youdesire the frustum to be cut. Draw straight lines asshown, which form the upper edges of the new figure,and draw the upper face projecting from one of theseedges. The diagram illustrated…
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