
doi: 10.1038/150607b0
SINCE my communication published in NATURE of October 17, p. 460, an excellent example of an ancient Egyptian arch has come to hand in Plate 17 of Glanville's “Legacy of Egypt”1, a photographic print of an imitation of matting in faience and stone on a panel from a gallery in the Step Pyramid at Saqqara. On testing the upper are of this arch, I find that it is undoubtedly developed from a 5-unit circle in the way I suggested for the arch of the Saqqara graph.
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