Title page printed in black and red Frontispiece portrait of the author Signatures: 2 leaves unsigned, A-S, Aa-Bb, Dd-Ss, T, 1 leaf unsigned, Tt,, Uu-Zz, Aaa-Ddd, Eee² In second sequence p. 120 is misnumbered 112; blank p. on verso of 137 and 138 (i.e., 139); numbering commences at 139 (i.e. 141) "Part of the ensuing discourse about light was written at the dersire of some gentlemen of the Royal society, in the year 1675. and ... read at their meetings, and the rest was added about twelve years after to complete the theory; except the third book, and the last proposition of the second, which were since put together out of scattered papers."--Advertisement, typesigned "I.N." Bound in old paneled calf Biomed's Rare (Beigelman) copy: Inkstamp of the Portsmouth Literary & Philosophical Society, on title page