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‘On no 141 are two as curious plans of bases and I have seen. The central one is falsely made hexagon in engraved plan. In fig 1 construct the pentagon by measure then inscribe circle, and use profile A No angle leaves’ Notebook M p.199.
Works, 9.6; Works, 10.73; Works, 10.139; Works, 11.274.
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[Version 0.05: May 2008]