The Outline of Science, Vol. 1 | Page 5

JACKDAW BALANCING ON A GATEPOST 208 Photo: O. J.
Wilkinson.

TWO OPOSSUMS FEIGNING DEATH 208 From Ingersoll's The Wit
of the Wild.
MALE OF THREE-SPINED STICKLEBACK, MAKING A NEST OF
WATER-WEED, GLUED TOGETHER BY VISCID THREADS
SECRETED FROM THE KIDNEYS AT THE BREEDING SEASON
209
A FEMALE STICKLEBACK ENTERS THE NEST WHICH THE
MALE HAS MADE, LAYS THE EGGS INSIDE, AND THEN
DEPARTS 209
HOMING PIGEON 212 Photo: Imperial War Museum.
CARRIER PIGEON 212 Photo: Imperial War Museum.
YELLOW-CROWNED PENGUIN 213 Photo: James's Press Agency.
PENGUINS ARE "A PECULIAR PEOPLE" 213 Photo: Cagcombe &
Co.
HARPY-EAGLE 216 Photo: W. S. Berridge.
THE DINGO OR WILD DOG OF AUSTRALIA, PERHAPS AN
INDIGENOUS WILD SPECIES, PERHAPS A DOMESTICATED
DOG THAT HAS GONE WILD OR FERAL 216 Photo: W. S.
Berridge, F.Z.S.
WOODPECKER HAMMERING AT A COTTON-REEL,
ATTACHED TO A TREE 217
THE BEAVER 220
THE THRUSH AT ITS ANVIL 221 Photo: F. R. Hinkins & Son.
ALSATIAN WOLF-DOG 226 Photo: Lafayette.
THE POLAR BEAR OF THE FAR NORTH 227 Photo: W. S.
Berridge.

AN ALLIGATOR "YAWNING" IN EXPECTATION OF FOOD 227
From the Smithsonian Report, 1914.
BABY ORANG 232 Photo: W. P. Dando.
ORANG-UTAN 232 Photo: Gambier Bolton.
CHIMPANZEE 233 Photo: James's Press Agency.
BABY ORANG-UTAN 233 Photo: James's Press Agency.
ORANG-UTAN 233 Photo: James's Press Agency.
BABY CHIMPANZEES 233 Photo: James's Press Agency.
CHIMPANZEE 238 Photo: W. P. Dando.
YOUNG CHEETAHS, OR HUNTING LEOPARDS 238 Photo: W. S.
Berridge.
COMMON OTTER 239 Photo: C. Reid.
SIR ERNEST RUTHERFORD 246 Photo: Elliott & Fry.
J. CLERK-MAXWELL 246 Photo: Rischgitz Collection.
SIR WILLIAM CROOKES 247 Photo: Ernest H. Mills.
PROFESSOR SIR W. H. BRAGG 247 Photo: Photo Press.
COMPARATIVE SIZES OF MOLECULES 250
INCONCEIVABLE NUMBERS AND INCONCEIVABLY SMALL
PARTICLES 250
WHAT IS A MILLION? 250
THE BROWNIAN MOVEMENT 251

A SOAP BUBBLE (Coloured Illustration) 252 Reproduced from The
Forces of Nature (Messrs. Macmillan).
DETECTING A SMALL QUANTITY OF MATTER 254 From
Scientific Ideas of To-day.
THIS X-RAY PHOTOGRAPH IS THAT OF A HAND OF A
SOLDIER WOUNDED IN THE GREAT WAR 254 Reproduced by
permission of X-Rays Ltd.
AN X-RAY PHOTOGRAPH OF A GOLF BALL, REVEALING AN
IMPERFECT CORE 254 Photo: National Physical Laboratory.
A WONDERFUL X-RAY PHOTOGRAPH 255 Reproduced by
permission of X-Rays Ltd.
ELECTRIC DISCHARGE IN A VACUUM TUBE 258
THE RELATIVE SIZES OF ATOMS AND ELECTRONS 258
ELECTRONS STREAMING FROM THE SUN TO THE EARTH 259
PROFESSOR SIR J. J. THOMSON 262
ELECTRONS PRODUCED BY PASSAGE OF X-RAYS THROUGH
AIR 262 From the Smithsonian Report, 1915.
MAGNETIC DEFLECTION OF RADIUM RAYS 263
PROFESSOR R. A. MILLIKAN'S APPARATUS FOR COUNTING
ELECTRONS 263 Reproduced by permission of Scientific American.
MAKING THE INVISIBLE VISIBLE 266
THE THEORY OF ELECTRONS 267
ARRANGEMENTS OF ATOMS IN A DIAMOND 267
DISINTEGRATION OF ATOMS 270

SILK TASSEL ELECTRIFIED 270 Reproduced by permission from
The Interpretation of Radium (John Murray).
SILK TASSEL DISCHARGED BY THE RAYS FROM RADIUM 270
A HUGE ELECTRIC SPARK 271
ELECTRICAL ATTRACTION BETWEEN COMMON OBJECTS
271 From Scientific Ideas of To-day.
AN ELECTRIC SPARK 274 Photo: Leadbeater.
AN ETHER DISTURBANCE AROUND AN ELECTRON CURRENT
275 From Scientific Ideas of To-day.
LIGHTNING 278 Photo: H. J. Shepstone.
LIGHT WAVES 279
THE MAGNETIC CIRCUIT OF AN ELECTRIC CURRENT 279
THE MAGNET 279
ROTATING DISC OF SIR ISAAC NEWTON FOR MIXING
COLOURS (Coloured Illustration) 280
WAVE SHAPES 282
THE POWER OF A MAGNET 282
THE SPEED OF LIGHT 283 Photo: The Locomotive Publishing Co.,
Ltd.
ROTATING DISC OF SIR ISAAC NEWTON FOR MIXING
COLOURS 283
NIAGARA FALLS 286
TRANSFORMATION OF ENERGY 287 Photo: Stephen Cribb.

"BOILING" A KETTLE ON ICE 287 Photo: Underwood &
Underwood.
THE CAUSE OF TIDES 290
THE AEGIR ON THE TRENT 290 Photo: G. Brocklehurst.
A BIG SPRING TIDE, THE AEGIR ON THE TRENT 291 Photo: G.
Brocklehurst.

The Outline of Science

INTRODUCTION
There is abundant evidence of a widened and deepened interest in
modern science. How could it be otherwise when we think of the
magnitude and the eventfulness of recent advances?
But the interest of the general public would be even greater than it is if
the makers of new knowledge were more willing to expound their
discoveries in ways that could be "understanded of the people." No one
objects very much to technicalities in a game or on board a yacht, and
they are clearly necessary for terse and precise scientific description. It
is certain, however, that they can be reduced to a minimum without
sacrificing accuracy, when the object in view is to explain "the gist of
the matter." So this OUTLINE OF SCIENCE is meant for the general
reader, who lacks both time and opportunity for special study, and yet
would take an intelligent interest in the progress of science which is
making the world always new.
The story of the triumphs of modern science is one of which Man may