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which scratched and pounded the solid rocks over which they moved. In British seas icebergs were continually stranding and floating, dropping their burdens of sand and gravel, as well as the huge masses of rock which had been frozen into them. As boulders we frequently meet with these erratics, which had thus been carried miles from their native or parent bed.

It was after the elevation of the glacial sea-bed into dry land, when the climate had toned down from its arctic vigour, although still much colder than it is now, that MAN first appeared on the scene. His rude flint implements have been found abundantly in the valley gravels of existing rivers, formed when those rivers had a greater volume of water than they have now. From that distant time to this, we never lose sight of him and his works, and there is exhibited in his history a similar development, or elevation, from a lower to a higher stage, to that which we have seen marking the lower animal and vegetable kingdoms in their appearance on the platform of existence. But it does not follow that because we can plainly trace the mode in which Deity has chosen to operate, that therefore He has been superseded by His own laws. Rather, it brings Him awfully near, for in the constant regulating and leading upwards of the organic world we never escape His presence!

APPENDIX.

In the foregoing pages frequent reference has been made to geological systems, formations, and divisions, besides the employment of other technical terms. We have therefore given, at the end, the following Table of the British Rocks, from the Catalogue of the School of Mines, Jermyn Street.

THE following TABLE shows the Succession of the British Formations, beginning with the newest Strata.

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LIAS.

MESOZOIC OR SECONDARY-cont.

Cornbrash.

Forest Marble Forest Marble and

Bradford Clay.

Great or Bath Oolite.

Great Oolite Stonesfield and Collyweston Slate and
Northampton Sands.

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Koessen Beds

Keuper.

Clay and Shale.

Marlstone.

Lias Clay, Shale, and Limestone. White Limestone or Westbury Beds. Bone Bed.

Red Marl and Upper Keuper Sandstone. Lower Keuper Sandstone and Marl (Waterstones

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