✹ Jesse on 25 Mar 2006 • Link A circular slide rule, made by John Brown http://ingenious.org.uk/See/Scien…
✹ Rex Gordon on 27 Dec 2006 • Link Per L&M ... John Brown(e) of the Minories, maker of mathematical instruments.
References Chart showing the number of references in each month of the diary’s entries. 1663 Mar 24 25 Aug 7 8 15 Dec 26 1664 Jan 13 16 Aug 10 1669 Apr 30 May 8
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Jesse • Link
A circular slide rule, made by John Brown
http://ingenious.org.uk/See/Scien…
Rex Gordon • Link
Per L&M ...
John Brown(e) of the Minories, maker of mathematical instruments.