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In the review of Mary P. Winsor, Reading the Shape of Nature: Comparative Zoology at the Agassiz Museum, published in our March 1993 issue, p. 115, Professor Winsor is quoted as having concluded that ‘By the middle of the nineteenth century the study of diversity was a natural science.’ This should have read ‘By the middle of the nineteenth century the study of diversity was a mature science.’ We apologize to Professor Winsor for this error.
Until recently, historians of mathematics usually agreed in refusing to consider the numerous geometrical publications of Thomas Hobbes as a contribution to the development of mathematics in the seventeenth century. From time to time, one could find statements that although Hobbes did not find new theorems he undoubtedly had profound insights into the logical foundations of mathematics, but these occasional remarks did not encourage historians to go deeper into Hobbes's mathematical thought. In the end, the general conclusion was that Hobbes's preoccupation with squaring the circle, doubling the cube (starting when the philosopher was more than forty years of age), and challenging Euclid's definitions were better ignored, at least in the history of science. In particular, his controversy with the Savilian professors Seth Ward and John Wallis was seen as a ‘deplorable affair’, liable only to damage the reputation of the protagonists.