Day, Lewis Foreman, 1845-1910 · London : B.T. Batsford · leaf 28
a series ofdiagonal lines bisecting the right angles—cut-ting the squares in half, that is to say—and wehave a new form to work upon, the triangle. If instead of the square lattice, one startswith a lattice of diamond shape, a thirdseries of cross lines bisecting the angles ofthe diamond produces… … Plate 2.
Decoration and ornament
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