II. A letter of Dr Wallis to Dr Sloan, concerning the quadrature of the parts of the lunula of Hippocrates Chius, performed by Mr John Perks; with the further improvements of the same, by Dr David Gregory, and Mr John Caswell

Abstract

Sir, The Squaring a certain Lunula by Hippocrates Chius long since, hath been known (as to the whole Lunula ) for many Ages. But (as to the Parts of it, and the Appurtenances thereunto,) New Discoveries have been lately made, which (I think) had not been consider'd by any before this present age.