Mathematics Teacher (1922) Vol. 15, No. 1
J.mb ia Uni, 'I t:. • c he,-,. c 0 11 idx nrtmrur uf ~ n THE MATHEMATICS TEACHER VOLG.:I!E XV JANUARY 1922 NUMBER 1 'rJTE TI L\fAN WORTH OF' RIGOROUS THINKING"" By ProCessor CASSIUS ,J. KP.YSEH Columbia University 'l'he question I puq>ose to discuss briefly is this: ~ow much mathematical discipline is essential to the
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