Manual of cardboard construction for third and fourth grades (1902)
Kunou, Charles A. [from old catalog] · [Los Angeles?] · leaf 30
28 A3 COURSE. No. 2. Triangular Keytag.Construction: With ruler draw line AB, 3 long. Using A and B as centers and AB as radius with compasses draw arcs to intersect above AB at C.AVith ruler draw lines AC and BC.Cut triangle with scissors.Measure 1 down from apex of triangle.Punch hole with… … 29 A3 COURSE.No. 3. Thread-winder.Construction: With compasses draw circle 1% radius. Divide circumference into six equal parts. Radius goes around circumference 6 times.Connect points, thus obtaining two equilateral triangles inscribed in a circle.Cut out figure with scissors. Material: Tagboard.
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Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
