He wished that D'Alembert should read it, to verify the mathematical calculations, and for this purpose he had put it into the hands of Morellet.

D'Alembert approved of the essay; and my father became advantageously known to Morellet as a man of science, and as one who had gratuitously and honourably conducted a useful work in France.

His predominating taste thus continued, as in former times, its influence, was still a connecting link between him and old and new friends.

On this and many other occasions he proved the truth of what has been asserted, that no effort is ever lost: his exertions at Lyons in 1772, after an interval of thirty years, now becoming of unexpected advantage to him and to his family at Paris.

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