Two volumes. 916pp. Black Boards, Silver lettering. Except for a lower bumped corner on Volume 2, this is a fine, unmarked set of a facsimile of the Third Edition(1726) with variant readings. Diagrams throughout. Text is in Latin with a bibliography in English. Unclipped green, ruled jacket has creasing to the upper extremities of Volume one. Of great importance in the history of mathematics and philosophy, Principia Mathematica sparked interest in symbolic logic and advanced the subject by popularizing it; it showcased the powers and capacities of symbolic logic; and it showed how advances in philosophy of mathematics and symbolic logic could go hand-in-hand with tremendous fruitfulness. This is a photrographic reprint of the Third edition, which allows the reader to see all the changes that Newton introduced and to determne exactly how the last and definitive edition, published a few months before Newton's death, grew from earlier versions. Size: 8 1/2" x 11 1/4".