DR. WILLIAM WHEWELL

THE

POPULAR SCIENCE

MONTHLY.





CONDUCTED BY E. L. Youman.




VOL. VII.

MAY, 1875, TO OCTOBER, 1875.




NEW YORK:
D. APPLETON AND COMPANY,
549 & 551 Broadway
1875.

Entered, according to Act of Congress, in the year 1875,

By D. APPLETON & CO.

In the Office of the Librarian of Congress, at Washington.

Table of Contents
PAGE
May 1875
Sea-Anemones 1
The First Traces of Man in Europe II 10
Scientific Prophecy 17
The Chemical Radiations 19
On Some of the Results of the Expedition of H M S Challenger 26
Evolution and the After-Life 46
Address to Medical Students 62
The Deeper Harmonies of Science and Religion I 66
Modern Street-Pavements 80
Discourse on the Death of Lyell 90
The Physiology of Authorship 93
Sketch of Dr. William Whewell 105
Correspondence 108
Editor's Table 110
Literary Notices 114
Miscellany 120
Notes 127
June 1875
Toadstools and their Kindred 129
Are Languages Institutions? 142
The Conservative Design of Organic Disease 160
The Microscope and its Misinterpretations 177
The Migration of Inland Birds 183
Savagism and Civilization I 195
Forests and Rainfall 207
The Cyclone in the Universe 209
A Curious Question of Horses' Ribs 214
Geographical Work of 1874 218
Wood's Discoveries at Ephesus 223
Correspondence 229
Editor's Table 230
Literary Notices 235
Miscellany 245
Notes 255
July 1875
Anent Ants 257
The First and the Last Catastrophe 268
Sexual Cerebration 287
The Deeper Harmonies of Science and Religion II 301
The Biography of a Bird 315
Recent Polar Explorations 320
Savagism and Civilization II 332
Thunder-Showers 340
The Australian Fever-Tree 344
The Sun's Work 348
The Endowment of Scientific Research I 354
Sketch of William Robert Grove 363
Correspondence 365
Editor's Table 365
Literary Notices 368
Miscellany 377
Notes 382
August 1875
Physical Features of the Colorado Valley I 385
The Form of Lightning-Rods 399
The Higher Education 402
On the Motions of Sound 410
Telegraphic Determination of Longitude 426
The American Chipmunk 433
The Endowment of Scientific Research II 437
The Pyrophone 444
Animal Phosphorescence 453
The Glaciers of Norway 458
Infirmities of Speech 463
Arctic Ice-Travels 468
Distribution of Atmospheric Moisture 483
Correspondence 487
Editor's Table 488
Literary Notices 491
Miscellany 503
Notes 510
September 1875
Scientific Culture 513
Physical Features of the Colorado Valley II 531
A Popular Verdict: Robert Knox 542
Tempered Glass 554
Fresh-Water Mollusks 563
The Deeper Harmonies of Science and Religion III 573
The Great Iowa Meteor 588
House-Ventilation 596
Cranial Amulets 607
The Use of Narcotics 611
Sketch of Professor Hilgard 617
Editor's Table 619
Literary Notices 623
Miscellany 628
Notes 639
October 1875
Bats and their Young 641
Instinct and Intelligence 653
Monkeys from a Cold Climate 665
Physical Features of the Colorado Valley III 670
A New Antiseptic 680
The Mechanical Action of Light 683
The Cause of the Light of Flames 696
Mental Discipline in Education 699
The Colorado Potato-Beetle 704
Pasteur on Fermentation 709
Croll on Climate and Time 719
The Artificial Preparation of Organic Bodies 726
Earthquakes and their Causes 732
Animal Life in Madagascar 738
Sketch of Professor Stokes 742
Correspondence
Editor's Table 746
Literary Notices 750
Miscellany 755
Notes 767
Index 769