Augsburg, De Resco Leo, b. 1859 · Boston, New York, Educational Pub. Co · leaf 146
)rism, Fig. 2 ; (3) the horizontalreceding triangular prism, Fig. 8. Models.— Use for a model a strip of stitf ])aper 9x13 inches,folded as in Fig. 4, with the lap glued, pinned, or a light elasticslipped around it. Vertical Prism.— Place the prism before you as in Fig. 4,and observe : (1) That… … 2, 3, 3, and 4, 4, (2) That the lines of each set are pairaliel,lines 2, 2, and 3, 3, being receding, converge slightly but theyrepresent parallel lines, and are called parallel. They should con-verge in the drawing, but they should not appear to converge.They should appear natural. 111.,,
Drawing
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