| 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 |
| COMET OF 1862 | 137 |
| COURSE OF DONATI'S COMET | 157 |
| 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 |
RAGNAROK:
THE AGE OF FIRE AND GRAVEL.
PART I.
The Drift
CHAPTER I.
THE CHARACTERISTICS OF THE DRIFT.
READER,--Let us reason together:--
What do we dwell on? The earth. What part of the earth? The latest formations, of course. We live upon the top of a mighty series of stratified rocks, laid down in the water of ancient seas and lakes, during incalculable ages, said, by geologists, to be from ten to twenty miles in thickness.
Think of that! Rock piled over rock, from the primeval granite upward, to a height four times greater than our highest mountains, and every rock stratified like the leaves of a book; and every leaf containing the records of an intensely interesting history, illustrated with engravings, in the shape of fossils, of all forms of life, from the primordial cell up to the bones of man and his implements.
But it is not with the pages of this sublime volume