LIST OF ILLUSTRATIONS.

GEOGRAPHICAL DISTRIBUTION OF THE DRIFT--Frontispiece.

TILL OVERLAID WITH BOWLDER-CLAY 5

SCRATCHED STONE, FROM THE TILL 6

RIVER ISSUING FROM A SWISS GLACIER 19

TERMINAL MORAINE 20

GLACIER-FURROWS AND SCRATCHES AT STONY POINT, LAKE ERIE 26

DRIFT-DEPOSITS IN THE TROPICS 38

STRATIFIED BEDS IN TILL, LEITHEN WATER, PEEBLESSHIRE, SCOTLAND 54

SECTION AT JOINVILLE 54

ORBITS OF THE PERIODIC COMETS 83

ORBIT OF EARTH AND COMET 88

THE EARTH'S ORBIT 89

THE COMET SWEEPING PAST THE EARTH 92

THE SIDE OF THE EARTH STRUCK BY THE COMET 93

THE SIDE NOT STRUCK BY THE COMET 93

THE GREAT COMET OF 1811 95

CRAG AND TAIL 98

SOLAR SPECTRUM 105

SECTION AT ST. ACHEUL 122

THE ENGIS SKULL 124

THE NEANDERTHAL SKULL 125

PLUMMET FROM SAN JOAQUIN VALLEY, CALIFORNIA 180

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COMET OF 1862 137

COURSE OF DONATI'S COMET 167

THE PRIMEVAL STORM 220

THE AFRITE IN THE PILLAR 270

DAHISH OVERTAKEN BY DIMIRIAT 272

EARTHEN VASE, FOUND IN THE CAVE OF FURFOOZ, BELGIUM 347

PRE-GLACIAL MAN'S PICTURE OF THE MAMMOTH 349

PRE-GLACIAL MAN'S PICTURE OF REINDEER 350

PRE-GLACIAL MAN'S PICTURE OF THE HORSE 351

SPECIMEN OF PRE-GLACIAL CARVING 352

STONE IMAGE FOUND IN OHIO 353

COPPER COIN, FOUND ONE HUNDRED AND FOURTEEN FEET UNDER GROUND, IN ILLINOIS {front} 356

COPPER COIN, FOUND ONE HUNDRED AND FOURTEEN FEET UNDER GROUND, IN ILLINOIS {back} 356

BIELA'S COMET, SPLIT IN TWO 409

SECTION ON THE SCHUYLKILL 432

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