...ents ingenious geological and meteorological conjectures; and transmitted to the Royal Society reports on French experiments in aeronautics. He entertained with a certain lavishness at his house in Passy ; and he was a frequent diner-out, adored for his wit and good humour in the intimate coteries of Mme. Helvetius and Mme. Brillon. He set up for the amusement of himself and his friends a private pr...