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Mathematics should be regarded as the alphabet of all philosophy."

"Divine mathematics, which alone can purge the intellect and fit the student for the acquirement of all knowledge."'

BY

H. E. SLAUGHT, PH.D., ScD.

PROFESSOR OF MATHEMATICS IN THE UNIVERSITY
OF CHICAGO

AND

N. J. LENNES, PH.D.

PROFESSOR OF MATHEMATICS IN THE UNIVERSITY
OF MONTANA