Minutes of an ordinary meeting of the Royal Society Mr Ball to speake with Sir William Persall about his Experiments of the Loadstone. Mr Stanhope, Mr Graunt, and Dr Power were admitted into the Society. Dr Power sent a Paper of some Experiments of his, concerning the rise of water in small tubes. Debated of Trades Sir William Petty promised against this day fortnight to produce his paper of trades. Discussed the purging of Gold through Antimony Dr Goddard, Dr Whistler, Dr Clarke, and Mr Croone asked individually to dissect Conyes 26 February 1662