Is Mars habitable? A critical examination of Professor Percival Lowell's book "Mars and its canals," with an alternative explanation
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Is Mars habitable? A critical examination of Professor Percival Lowell's book "Mars and its canals," with an alternative explanation - Alfred Russel Wallace
IS MARS HABITABLE? A CRITICAL EXAMINATION OF PROFESSOR PERCIVAL LOWELL’S BOOK MARS AND ITS CANALS,
WITH AN ALTERNATIVE EXPLANATION
..................
Alfred Russel Wallace
DOSSIER PRESS
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Copyright © 2016 by Alfred Russel Wallace
Interior design by Pronoun
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TABLE OF CONTENTS
PREFACE.
TABLE OF CONTENTS.: CHAPTER I.
CHAPTER II.
CHAPTER III.
CHAPTER IV.
CHAPTER V.
CHAPTER VI.
CHAPTER VII.
CHAPTER VIII.
CHAPTER I.
CHAPTER II.: MR. PERCIVAL LOWELL’S DISCOVERIES AND THEORIES.
CHAPTER III.: THE CLIMATE AND PHYSIOGRAPHY OF MARS.
CHAPTER IV.: IS ANIMAL LIFE POSSIBLE ON MARS?
CHAPTER V.: THE TEMPERATURE OF MARS—MR. LOWELL’S ESTIMATE.
CHAPTER VI.: A NEW ESTIMATE OF THE TEMPERATURE OF MARS.
CHAPTER VII.: A SUGGESTION AS TO THE ‘CANALS’ OF MARS.
CHAPTER VIII.: SUMMARY AND CONCLUSION.
Is Mars habitable? A critical examination of Professor Percival Lowell’s book Mars and its canals,
with an alternative explanation
By
Alfred Russel Wallace
Is Mars habitable? A critical examination of Professor Percival Lowell’s book Mars and its canals,
with an alternative explanation
Published by Dossier Press
New York City, NY
First published circa 1913
Copyright © Dossier Press, 2015
All rights reserved
Except in the United States of America, this book is sold subject to the condition that it shall not, by way of trade or otherwise, be lent, re-sold, hired out, or otherwise circulated without the publisher’s prior consent in any form of binding or cover other than that in which it is published and without a similar condition including this condition being imposed on the subsequent purchaser.
About Dossier Press
PREFACE.
..................
THIS SMALL VOLUME WAS COMMENCED as a review article on Professor Percival Lowell’s book, Mars and its Canals, with the object of showing that the large amount of new and interesting facts contained in this work did not invalidate the conclusion I had reached in 1902, and stated in my book on Man’s Place in the Universe, that Mars was not habitable.
But the more complete presentation of the opposite view in the volume now under discussion required a more detailed examination of the various physical problems involved, and as the subject is one of great, popular, as well as scientific interest, I determined to undertake the task.
This was rendered the more necessary by the fact that in July last Professor Lowell published in the Philosophical Magazine an elaborate mathematical article claiming to demonstrate that, notwithstanding its much greater distance from the sun and its excessively thin atmosphere, Mars possessed a climate on the average equal to that of the south of England, and in its polar and sub-polar regions even less severe than that of the earth. Such a contention of course required to be dealt with, and led me to collect information bearing upon temperature in all its aspects, and so enlarging my criticism that I saw it would be necessary to issue it in book form.
Two of my mathematical friends have pointed out the chief omission which vitiates Professor Lowell’s mathematical conclusions—that of a failure to recognise the very large conservative and cumulative effect of a dense atmosphere. This very point however I had already myself discussed in Chapter VI., and by means of some remarkable researches on the heat of the moon and an investigation of the causes of its very low temperature, I have, I think, demonstrated the incorrectness of Mr. Lowell’s results. In my last chapter, in which I briefly summarise the whole argument, I have further strengthened the case for very severe cold in Mars, by adducing the rapid lowering of temperature universally caused by diminution of atmospheric pressure, as manifested in the well-known phenomenon of temperate climates at moderate heights even close to the equator, cold climates at greater heights even on extensive plateaux, culminating in arctic climates and perpetual snow at heights where the air is still far denser than it is on the surface of Mars. This argument itself is, in my opinion, conclusive; but it is enforced by two others equally complete, neither of which is adequately met by Mr. Lowell.
The careful examination which I have been led to give to the whole of the phenomena which Mars presents, and especially to the discoveries of Mr. Lowell, has led me to what I hope will be considered a satisfactory physical explanation of them. This explanation, which occupies the whole of my seventh chapter, is founded upon a special mode of origin for Mars, derived from the Meteoritic Hypothesis, now very widely adopted by astronomers and physicists. Then, by a comparison with certain well-known and widely spread geological phenomena, I show how the great features of Mars—the ‘canals’ and ‘oases’—may have been caused. This chapter will perhaps be the most interesting to the general reader, as furnishing a quite natural explanation of features of the planet which have been termed ‘non-natural’ by Mr. Lowell.
Incidentally, also, I have been led to an explanation of the highly volcanic nature of the moon’s surface. This seems to me absolutely to require some such origin as Sir George Darwin has given it, and thus furnishes corroborative proof of the accuracy of the hypothesis that our moon has had an unique origin among the known satellites, in having been thrown off from the earth itself.
I am indebted to Professor J. H. Poynting, of the University of Birmingham, for valuable suggestions on some of the more difficult points of mathematical physics here discussed, and also for the critical note (at the end of Chapter V.) on Professor Lowell’s estimate of the temperature of Mars.
BROADSTONE, DORSET, October 1907.
TABLE OF CONTENTS.: CHAPTER I.
..................
EARLY OBSERVERS OF MARS,
—Mars the only planet the surface of which is
—Early observation of the snow-caps and seas
—The ‘canals’ seen by Schiaparelli in 1877
—Double canals first seen in 1881
—Round spots at intersection of canals seen
—Confirmed by Lowell in 1894
—Changes of colour seen in 1892 and 1894
—Existence of seas doubted by Pickering and
CHAPTER II.
..................
MR. LOWELL’S DISCOVERIES AND THEORIES,
—Observatory at Flagstaff, Arizona
—Illustrated book on his observations of
—Volume on Mars and its canals, 1906
—Non-natural features
—The canals as irrigation works of an intelligent
—A challenge to the thinking world
—The canals as described and mapped by Mr. Lowell
—The double canals
—Dimensions of the canals
—They cross the supposed seas
—Circular black spots termed oases
—An interesting volume.
CHAPTER III.
..................
THE CLIMATE AND PHYSIOGRAPHY OF MARS,
—No permanent water on Mars
—Rarely any clouds and no rain
—Snow-caps the only source of water
—No mountains, hills, or valleys on Mars
—Two-thirds of the surface a desert
—Water from the snow-caps too scanty to supply
—Miss Clerke’s views as to the water-supply
—Description of some of the chief canals
—Mr. Lowell on