HOBBES, Thomas.

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Decameron Physiologicum: or, Ten Dialogues of Natural Philosophy. First edition, Hobbes's final work, published when he was over 90, a contribution to the Hobbes-Wallis controversy, a bitter dispute in the English scientific scene from the 1650s into the 1670s.Decameron Physiologicum offered a "new set of dialogues on physical questions, in the fashion of the earlier ones, but now with a stroke added at Wallis's doctrine of gravitation in the De Motu. And a demonstration of the equality of a straight line to the arc of a circle was, of course, thrown in at the end, to show him true as ever to the desperate purpose that had maintained the long quarter of a century of strife" (MacDonald & Hargreaves).

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