| Description | Sir Robert Redding, Mr Barrington, Dr Croon, Mr Haak and Mr Hook chosen by ballot to be a Committee for auditing the accounts. Three of them to be a quoru.
Mr Oldenburg produced and read some experiments made in the air-pump by Mr Papin, directed by Mr Huygens. Thee were several mixtures of various liquors, such as aqua-fortis, and spirit of wine, aqua vitae and spirit of wine, common water and aqua vitae; to see what ebullitions they made in vacuo; and whether these ebullitions made new air; aand the difference fo the air formed by the mixture of aqua fortis and copper, from that which was produced by the mixture of oil of tartar and oil of vitriol, of which two mixtures the former yielded an air always remaining, the later not so.
There was an account of an experiment of a mixture of aquafortis and aquavitae with bits of iron in it; some of which wa put in vacuo, some not; together with oil of olives with vinegar, and with spirit of wine; as also with water and lyme; and with plaister of Paris sleaked in vacuo, together with the considerable different effects of them, in vacuo and in the open air.
The producer was asked to enter the experiments in the Register, and if had more of them to impart them.
Ordered, on the urging of Dr Croon, that the Exhausting Engine should be put in order, for making more experiments in it, as he intended to make some trials.
Mr Oldenburg communicated 'Mr Newton's answer of November 13 1675 to Mr Linus his letter of February 25 1675 concerning an experiment relating to Mr Newton's new theory of Light and Colours; which imports that the experiment contested was made in a clear day, and that the Prism therein imployed, was placed close to the hole and that the coloured image was not parallel to the Axis of the Prism, but transverse to it. Which three particulars being contradicted by Mr Linus, Mr Newton in the Letter directs his Antagonist again very punctually, in what manner to try the Experiment, to satisfy himself about his veracity in relating the same.
Besides, Mr Newton offering in the same Letter to send to the Society a Discourse of his about Colors, when it shall be thought convenient, the Society ordered the Secretary to thank him for his Offer, and to desire him to send that Discourse as soon as he pleased. ' |