BY OLINTHUS GREGORY, LL.D. OF THE ROYAL MILITARY ACADEMY, WOOLWICH; MONOBARY MEMBER OF THE PHILOSOPHICAL SOCIETIES OF LONDON AND AND OF THE NEWCASTLE ANTIQUARIAN SOCIETY. THE THIRD EDITION, CORRECTED AND IMPROVED, VOL. II. CONTAINING REMARKS ON THE NATURE, CONSTRUCTION, AND SIMPLIFICA- AND DESCRIPTIONS OF MANY CURIOUS AND USEFUL MACHINES. -Talem intelligo Philosophiam naturalem, quæ non abeat in fumos LONDON: PRINTED FOR F. C. AND J. RIVINGTON; G. WILKIE; J. RICHARD- |