Principia mathematica
Cambridge: University Press, 1910; 1927; 1927. Three volumes. 8vo. xiii, [iii], 666; xxxi, [i], 742; viii, 491 pp., including half-titles. FIRST EDITION VOL. 1, SECOND EDITION OF VOLS. 2 AND 3. Original blue cloth, exteriors faintly rubbed and small tear to bottom edge of second volume, still an excellent set..... More