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THE increasing number of teachers who are becoming interested in the history of mathematics will welcome this little book, which is divided into two parts, treating respectively of the
abacus and algorism. Admirable diagrams enable the reader to perform simple calculations with the abacus, and the chapters on algorism throw considerable light on the evolution of our modern
methods of computation.
By Florence A. Yeldham. With an Introduction by Dr. Charles Singer. Pp. 96. (London, Calcutta and Sydney: George G. Harrap and Co., Ltd., 1926.) 4s. 6d. net.
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