'At home all day. On reading Derham's notes on Boyle's lectures I find he says that Mr Boyle demonstrates that so slender a wire may be drawn from gold that from once ounce of gold a wire may be drawn 777,600 feet in length or 155 miles and a half. In the even Tho. Davy here and supped with us and stayed until 11 o'clock but drunk nothing, only 1 pint of mild beer. We read Smart's poems on immensity, omniscience and power.'