Transcriber’s note: Table of Contents added by Transcriber.
CONTENTS
Chapters on the Stars227
Preventive Inoculation. (II.)240
Colonies and the Mother Country. (II.)248
Technical Education at the Massachusetts Institute of Technology257
The Psychology of Crazes285
Some Phases of the Earth’s Development in the Light of Recent Chemical Research295
A Preliminary Account of the Solar Eclipse of May 28, 1900, As Observed by the Smithsonian Expedition302
Malaria and the Malarial Parasite310
New Sources of Light and of Röntgen Rays318
Discussion and Correspondence323
Scientific Literature327
The Progress of Science332
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.
PRESIDENT G. K. GILBERT,
American Association for the Advancement of Science.
227
THE
POPULAR SCIENCE
MONTHLY.
JULY, 1900.
CHAPTERS ON THE STARS.
By Professor SIMON NEWCOMB.
 I. Introductory.
It would be difficult to name any subject of investigation, the progressof which during our time has been more remarkable than thatin the field of stellar astronomy. Several features of this progress areespecially noteworthy. One of these is the mere extension of research.A natural result of the northern hemisphere being the home of civilizedpeoples was that, thirty years ago, the study of the southernheavens had been comparatively neglected. It is true that the curiosityof the inquiring astronomers of the pas                        
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