Minutes of an ordinary meeting of the Royal Society Mr Le Febvre brought in a mass of Calx viva and honey; a crystal of saltpetre separated after it had been mixed with sugar and rose-water; as also a little of a metallic tincture, that being thrown in water did tinge at first, but by reflection but after the water was stirred was tinged through with a clear purple colour: He was asked to write an account of all three. Mr Winthrop produced a little stone of which one part was as it came from the rock, of an amethist colour, and the other was, after calcinetion, a flesh colour. He also brought a piece of wood called Lignum Colubrinum or in Dutch Schlangen holtz, whose taste is better. Sir Robert Moray read his account of the satellites of 4[?] on Friday the 25th of this month. The Operator to provide two birds, a chicken and another bird, and a live mouse or two for the next meeting. Mr Hill asked to procure some of the water, which is brought from the East Indies; to compare it with this of this Country. That 2 or 3 Carps bladders to be provided for the mext meeting. Experiments for the next meeting; Mr Boyle's Engine to bee exercised, and a carps bladder put into the long tube. 30 April 1662