25 Mar 2006, 5:39 a.m. - Jesse

A circular slide rule, made by John Brown http://ingenious.org.uk/See/Scienceandtechnology/Mathematics/?target=SeeMedium&ObjectID=%7BE0ADBFD8-EDA3-88D1-9E91-2F912122D1E6%7D&s=S1&viewby=images&

27 Dec 2006, 2:10 p.m. - Rex Gordon

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

1664

1669