Found in 43 Collections and/or Records:
A draft of the notice of his Catoptrics and Dioptrics textbook which Gregory intended for the Transactions of the Royal Society.
Notes from a London meeting with Sir Isaac Newton on a revised plan for the Astronomiae physicae et geometricae elementa, (1702), Gregory's most important work. An erratum lies at the foot of this document, unrelated to it or to any of the other things on the sheet (which have their own entries in Gregory's index): a jotting about refraction, crystals, and cataracts of the eye. This is dated London, 30 May 1708.
A page on the apparent position of planets, in light of Descartes. "Bayle" could conceivably refer to Pierre Bayle (1647-1706), who critiqued Cartesianism once, early in his career, but Peter Bayle was not strictly known as a mathematician or an astronomer.
A page of calculations about reflections in spherical surfaces, probably related to Catoptricae et dioptricae sphaericae elementa.
Ersatz title is "Memorandum to Dr Gray to pick up as he finds opportunity these books". They are partial titles, numbering about a dozen, covering subjects as divers as optics, astronomy, and gardening.
Ruminations on atmospheric effects near the horizon.
A page about refraction through different media.