lves to the
ignorance in which they were left at school, by our wretched system
of teaching by the book only, will thank Mr. Serviss for the
suggestions he has so well carried out."--_New York Times._

PLEASURES OF THE TELESCOPE.

A Descriptive Guide to Amateur Astronomers and All Lovers of the
Stars. Illustrated. 8vo. Cloth, $1.50.

"The volume will be found interesting by those for whom it is
written, and will inspire many with a love for the study of
astronomy, one of the most far-reaching of the
sciences."--_Milwaukee Journal._

D. APPLETON AND COMPANY, NEW YORK.

* * * * * *

[Illustration: CHART OF MARS. After Schiaparelli.]

OTHER WORLDS

Their Nature, Possibilities and Habitability in the Light of the Latest
Discoveries.

by

GARRETT P. SERVISS

Author of
"Astronomy with an Opera-glass" and "Pleasures of the Telescope"

With Charts and Illustrations

"Shall we measure the councils of heaven by the narrow impotence of
human faculties, or conceive that silence and solitude reign
throughout the mighty empire of nature?"

--DR. THOMAS CHALMERS.

New York
D. Appleton and Company
1901
Copyright, 1901,
by D. Appleton and Company.

TO THE MEMORY OF WILLIAM JAY YOUMANS.

PREFACE

The point of view of this book is human interest in the other worlds
around us. It presents the latest discoveries among the planets of the
solar system, and shows their bearing upon the question of life in those
planets. It points out the resemblances and the differences between the
earth and the other worlds that share with it in the light of the sun.
It shows what we should see and experience if we could visit those
worlds.

While basing itself upon facts, it does not exclude the discussion of
interesting probabilities and theories that have commanded wide popular
attention. It points out, for instance, what is to be thought of the
idea of interplanetary communication. It indicates what must be the
outlook of the possible inhabitants of some of the other planets toward
the earth. As far as may be, it traces the origin and development of the
other worlds of our system, and presents a graphic picture of their
present condition as individuals, and of their wonderful contrasts as
members of a common family.

In short, the aim of the author has been to show how wide, and how rich,
is the f