CONTENTS

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Preventive Inoculation 115
Professor Ewart's Penycuik Experiments 126
Colonies and the Mother Country 139
The Future of the Negro in the Southern States 147
The Physical Geography of the Lands 157
The New York Botanical Garden 171
Gas and Gas Meters 179
The Sun's Destination 191
A Biographical Sketch of an Infant 197
Correspondence 206
Scientific Literature 213
The Progress of Science 219

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.

PROFESSOR WOLCOTT GIBBS,
President of the National Academy of Sciences, Emeritus Rumford Professor and Lecturer on the Applications of Science to the Useful Arts at Harvard University.

                                                                                                                                                                                                                                                                                                           

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