Manual of cardboard construction for third and fourth grades (1902)
Kunou, Charles A. [from old catalog] · [Los Angeles?] · leaf 39
nstruction: Draw line A. B. 3, and on it with compasses construct equilateral triangles, above and below.On the sides of triangle C construct triangles D, E.At middle points of sides, draw perpendiculars 14. and draw slanting lines, as in drawing.Draw flap lines i/o Ijelow triangles.Score and fold… … 38
Paper work
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
