Transcriber’s note: Table of Contents added by Transcriber.

[Address of the President Before the British Association]	561
[The Bubonic Plague]	576
[Gasoline Automobiles]	593
[Some Scientific Principles of Warfare]	605
[Modern Mongols]	618
[Religious Beliefs of the Central Eskimo]	624
[Mental Energy]	632
[Chapters on the Stars]	638
[Discussion and Correspondence]	660
[Scientific Literature]	662
[The Progress of Science]	664
[Index]	669

THE
POPULAR SCIENCE
MONTHLY

EDITED BY
J. McKEEN CATTELL

VOL. LVII
MAY TO OCTOBER, 1900

NEW YORK AND LONDON
McCLURE, PHILLIPS AND COMPANY
1900

CONTENTS