Description | Doctor John Mapletoft was elected and admitted.
Mr Sheers, Mr Hall and Signor Franciscus Travigino were elected, but not admitted this time.
Mr Birchenshaw presented himself to the Society, and showed his Scale of Musick, to gether with the six headings of contents.
' After this, there was read the last part of Mr Newton's Discourse, wherein it is considered in nine Propositions, how the Phenomena of thin transparent plates stand related to those fo all other natural Bodies: of which bodies having already told us that they appear of divers colours, accordingly as they are disposed to reflect most copiously the rayes endured with those Colours; he now inquires after their constitutions, whereby they reflect some rayes more copiously than others.
Here among many other considerable things, he shews, How the bignesse of the component parts of natural bodies may be conjectured by their Colours as also, that the cause of Reflexion is not the impinging of Light on the solid and impervious parts of Bodies, as is commonly supposed. ' |