DECREMPS, Henri (1746 ? 1846). Philosophical Amusements; or, Easy and Instructive Recreations for Young People. London: Printed for J. Johnson, 1797. Second edition, corrected and improved. Contemporary marbled wrappers. Pp. [i-iii], iv ? viii, [1], 2 ? 72. Two plates bound at front. Tables in text.12mo. Scattered foxing, but clean and bright overall; very good. Toole Stott 239. Includes accounts of the Impenetrable Secret, double-faced coins, speaking tubes, and sliding pips to change cards, among other tricks and swindles.