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Illustration page from Philosophical Transactions. Page with illustrations and diagrams from a 1667 issue of 'Philosophical Transactions of the Royal Society of London'. These illustrations precede page 541 of volume 2, and accompany issue 29, dated 11 November 1667. The illustration shows 'An instrument for dividing a foot into many thousand parts, and thereby measuring the diameters of planets to great exactness etc.'. This device was invented by English astronomer Richard Towneley. The detailed description is on pages 541-544.
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