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THE
POPULAR SCIENCE
MONTHLY
EDITED BY
J. McKEEN CATTELL
VOL. LVIII
NOVEMBER. 1900, TO APRIL, 1901
NEW YORK AND LONDON
McCLURE, PHILLIPS AND COMPANY
1901
THE
POPULAR SCIENCE
MONTHLY
EDITED BY
J. McKEEN CATTELL
VOL. LVIII
NOVEMBER. 1900, TO APRIL, 1901
NEW YORK AND LONDON
McCLURE, PHILLIPS AND COMPANY
1901