It is situated on Waterloo dock, and the pier of the observatory rests upon the sandstone of that region, The telescope is an equatorial; like many good instruments in our country, it is almost unused.

And all this, and moreas may be proved from the geology of foreign countrieshappened between the date of the boulder-clay, and that of the New Red sandstone on which it rests.

The hills have decreased in height, the upper strata thick-bedded coarse sandstone with sandstone shale beneath; hard white sandstone exists in some of the lower ridges.

The southern face of Sea Range is very abrupt and surmounted by a cliff of red sandstone 50 to 100 feet high, the whole height of the hills about 500 feet, the range being the edge of an elevated tableland, the upper strata being hard sandstone in horizontal beds which rest on soft shales which appear to be somewhat inclined; but its surface was so covered by fragments of the upper rocks that no satisfactory data was obtained.

We then steered south-east to a detached conical hill, which consisted of the same hard fine-grained sandstone as the ranges near the camp.

which, rising in the higher lands more to the eastward, rapidly abrade, and in their onward course remove the soft and porous sandstone from their bases.

The Fitzroy Range is almost isolated, and there is a level plain five or six miles wide to the south-east, beyond which there is a high sandstone range surmounted by an almost unbroken cliff of sandstone near the summit, and which appeared to be quite impassable.

Moreover, in the case of freshwater deposits of this kind it is certain that the action of percolating water may convert the originally soft and friable, fine-grained sandstone into a dense, semi-transparent opaline stone, the silicious organized skeletons being dissolved, and the silex re-deposited in an amorphous state.

Pine on its shores, bottom sandy, shells in its bed, no rock seen in place, but loose pieces of coarse gray sandstone around its shores.

In this comprehensive glance we may also notice the shallow wind-worn caves in stratified sandstones along the margins of the plains; and the cave-like recesses in the Sierra slates and granites, where bears and other mountaineers find shelter during the fall of sudden storms.

By a change in the formation from sandstone to trap, a soil this here produced capable of supporting a vegetation equal in luxuriance to any within the tropics.