Established by Edward L. Youmans

APPLETONS'
POPULAR SCIENCE
MONTHLY

EDITED BY
WILLIAM JAY YOUMANS

VOL. LIV
NOVEMBER, 1898, TO APRIL, 1899

NEW YORK
D. APPLETON AND COMPANY
1899


Copyright, 1899,
By
D. APPLETON AND COMPANY.


Vol. LIV.Established by Edward L. Youmans.No. 4.

APPLETONS'POPULAR SCIENCEMONTHLY.

FEBRUARY, 1899.

EDITED BY WILLIAM JAY YOUMANS.


CONTENTS.

 PAGE
I.Vegetation a Remedy for the Summer Heat of Cities. By Stephen Smith, M.D., LL.D433
II.Mivart's Groundwork of Science. By Prof. Wm. Keith Brooks450
III.The Science of Observation. By Charles Livy Whittle. (Illustrated.)456
IV.Death Gulch, a Natural Bear-Trap. By T.A. Jaggar, Jr. (Illustrated.)475
V.The Labor Problem in the Tropics. By W. Alleyne Ireland481
VI.Principles of Taxation. XX. The Law of the Diffusion of Taxes. Part II. By the Late Hon. David A. Wells490
VII.The Great Bombardment. By Charles F. Holder. (Illustrated.)506
VIII.The Spirit of Conquest. By J. Novicow518
IX.A Short History of Scientific Instruction. II. By Sir J.N. Lockyer529
X.The Series Method: a Comparison. By Charlotte Taylor537
XI.The Earliest Writing in France. By M. Gabriel de Mortillet...

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