Coolidge, J.L. "The Number *e*" in *The American Mathematical Monthly*, volume 57, number 9, November 1950. Coolidge's article occupies pp 591-602 of the issue (which comprises pp 591-662. Excellent short summary of the history and innards of the number e by the superb Julian Lowell Coolidge, long-time chair of Harvard math. Original printed wrappers. Very good condition. Nice fresh copy. $40

Other works by Cooliedge:

J. L. Coolidge (1909) *The elements of non-Euclidean geometry*, Oxford University Press.

J. L. Coolidge (1916) *A treatise on the circle and the sphere*, Oxford University Press.

J. L. Coolidge (1924) *The geometry of the complex domain*, The Clarendon Press.

J. L. Coolidge (1925) *An introduction to mathematical probability*, Oxford University Press.

J. L. Coolidge (1931) *A Treatise on Algebraic Plane Curves*, Oxford University Press (Dover Publications 2004).

J. L. Coolidge (1940) *A history of geometrical methods*, Oxford University Press (Dover Publications 2003).

J. L. Coolidge (1945) *History of the conic sections and quadric surfaces*, The Clarendon Press.

J. L. Coolidge (1949) *The Mathematics Of Great Amateurs*, Oxford University Press (Dover Publications 1963).

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