Rhythms and Geologic Time 339
The Photography of Sound Waves 354
The Psychology of Red 365
Chapters on the Stars 376
Colonies and the Mother Country (III) 390
Causes of Degeneration in Blind Fishes 397
The Evolution and Present Status of the Automobile 406
Scientific Results of the Norwegian Polar Expedition, 1893-1896 420
Discussion and Correspondence 436
Scientific Literature 439
The Progress of Science 442
THE
POPULAR SCIENCE
MONTHLY
EDITED BY
J. MCKEEN CATTELL
VOL. LVII
MAY TO OCTOBER, 1900
NEW YORK AND LONDON
MCCLURE, PHILLIPS AND COMPANY
1900
COPYRIGHT, 1900,
BY MCCLURE, PHILLIPS AND COMPANY.
[Illustration: PROFESSOR R. S. WOODWARD,