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THE
POPULAR SCIENCE
MONTHLY
EDITED BY
J. McKEEN CATTELL
VOL. LXVI
NOVEMBER. 1904, TO APRIL, 1905
NEW YORK
THE SCIENCE PRESS
1904
THE
POPULAR SCIENCE
MONTHLY
EDITED BY
J. McKEEN CATTELL
VOL. LXVI
NOVEMBER. 1904, TO APRIL, 1905
NEW YORK
THE SCIENCE PRESS
1904