M. Eugenio Rignano, published monthly by Messrs.

Williams and Norgate, London, Nicola Zanichelli, Bologna, and Felix Alcan, Paris. The essay ' On the Notion of Cause ' was the presidential address to the Aristotelian Society in November, 1912, and was pub- lished in their Proceedings for 1912-13. ' Knowledge by Acquaintance and Knowledge by Description " was also a paper read before the Aristotelian Society, and pub- lished in their Proceedings for IQIO-II.
LONDON,
CONTENTS
Ctutpte Fug*
I . Mysticism and Logic i