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John Newton, Trigonometria Britanica: or, the doctrine of triangles, in two books (London, 1658)
Archbishop Marsh annotated his personal books infrequently, but in many of his mathematical works he completed equations or added mathematical notes. This particular section of John Newton’s book deals with ‘the quantity of right lines within a circle’, and Marsh has added detailed mathematical comments into the margins of page 2.
Citation:
John Newton, Trigonometria Britanica: or, the doctrine of triangles, in two books (London, 1658),
Marsh's Library Exhibits,
accessed December 6, 2025,
https://www.marshlibrary.ie/digi/items/show/589
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