| Description | Hadley describes the use of the instrument aboard the Chatham yacht from 30 August 1732 to 1 September 1732, during which altitudes of the Sun were recorded. Figure in text and engraved figure attached.
Subject: Astronomy / Navigation / Scientific apparatus and equipment
Read to the Royal Society on 15 March 1732/3
Published in Philosophical Transactions as 'An account of observations made on board the Chatham-Yacht, August 30th and 31st, and September 1st, 1732, in pursuance of order made by the Right Honourable the Lords Commissioners of the admiralty, for the trial of an instrument for taking angles, described in Philosophical Transactions, Numb, 420' |