xix, 463, [6]. Edited, translated and with an introduction by J.M. Child. With a short biography of Boscovich by Branislav Petronievic. Facsimile of first Venetian edition as frontispiece, text illustrations. 14¾x10¾, original bevelled green cloth, spine gilt. First edition in English.

With a "Presentation Copy" inkstamp on initial blank. This is Boscovich's most important work. The Latin and English are printed in parallel.