CONTENTS

South Sea Bubbles in Science	401
What Makes the Trolley Car Go	408
Is the Christian Religion Declining?	423
A Century of Geology	431
The Applications of Explosives	444
A Year’s Progress in the Klondike	456
The Decline of Criminal Jurisprudence in America	466
The Blind Fishes of North America	473
The Man of Science in Practical Affairs	487
Forenoon and Afternoon	492
President Jordan’s “Neminism.”	494
Correspondence	497
Editor’s Table	501
Fragments of Science	505
Minor Paragraphs	510
Publications Received	512

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Established by Edward L. Youmans

APPLETONS’
POPULAR SCIENCE
MONTHLY

EDITED BY
WILLIAM JAY YOUMANS

VOL. LVI
NOVEMBER, 1899, TO APRIL, 1900

NEW YORK
D. APPLETON AND COMPANY
1900

Copyright, 1900,
By D. APPLETON AND COMPANY.

401

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APPLETONS’
POPULAR SCIENCE
MONTHLY.

FEBRUARY, 1900.

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SOUTH SEA BUBBLES IN SCIENCE.
By Prof. JOHN TROWBRIDGE,
DIRECTOR OF JEFFERSON PHYSICAL LABORATORY, HARVARD UNIVERSITY.

The advances in science lead to hopes of the sudden accumulationof gold, just as the discovery of new worlds led ourancestors to invest in many inflated enterprises of commerce andconquest. This older temptation has passed away, for there areno new worlds to discover, and this small globe has been practicallystaked out; but the mysterious domains of science are still illimitable,and afford vast opportunities for inflated schemes which havetheir proto

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