From John Robertson
AL: American Philosophical Society
<The Royal Society, July 14, 1772, a note in the third
person. The committee appointed by the Society, at the request of the
Board of Ordnance, to suggest how to apply lightning rods to the
powder magazine at Erith is requested to meet at the Society’s
quarters in Crane Court on Saturday, July 18, at seven P.M.;
Franklin’s presence is desired.>
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