Copy paper, 'The eclipse was observ'd by Francis Willoughby [Willughby], [Walter] Pope, [Henry] Phillips and myself in Gresham College, London, 22 June 1666' by Robert Hooke The authors describe a solar eclipse observed at Gresham College. The eclipse began at 5:43pm. It was darkened, {3/11 diam.at 6.00 5 dig. at 7. 06 {4 digits at 6. 07 4 dig. at 7. 13 {5 dig. at 6. 13 3 dig. at 7. 20 {6 dig. at 6. 21 2 dig. at 7. 26 {7 dig. at 6. 39½ 1 dig. at 7. 32 {6 dig. at 6. 57 0 dig. at 7. 37. Its duration appears to have been one hour and 54 minutes. Its greatest obscurity was somewhat more than 7. digits. Subject: Astronomy Read to the Royal Society on 27 June 1666 Published in Philosophical Transactions as 'Observations made in several places, of the late eclipse of the sun, which hapned on the 22 of June, 1666' 1666