Letter, from Monsieur [René Antoine Ferchault] de Reaumur to Cromwell Mortimer, dated at Paris Original was in French and dated 3 December 1738 Thanks for being elected to the Fellowship and sends a copy of the fourth volume of his work on insects to present to the Society Attached to this letter is an annotated page from 'The Pennsylvania Gazette' dated 1732 with a piece about making 'shallow fresh Rivers navigable for Skows, Flats, Barges, and such like Vessels'. (See EL/M3/40 a letter by Joseph Morgan about this) 'Pennsylvania Gazette' edited by Benjamin Franklin 1738