Paper, 'Observations of the eclipses of Jupiter's satellites from 1700 to 1727' by William Derham Derham writes: 'As exact tables to calculate the eclipses of the satellites, would be of very great service to find the longitude of places; so I have some hope that these observations of some of them, in more revolutions that one of Jupiter, may be of use to correct or make such Tables.' Subject: Astronomy Read to the Royal Society on 14 December 1727 Communicated by Hans Sloane Published in Philosophical Transactions as 'Observations of the eclipses of Jupiter’s satellites, from 1700, to the year 1727' 1727