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In this beautiful memoir, the illustrious astronomer developes the series of experiments, by the aid of which each observation may give the instant of the real disappearance of a satellite, distinguished from the instant of the apparent disappearance, whatever be the power of the telescope used, whatever be the altitude of the eclipsed body above the horizon, and consequently, whatever be the transparency of the atmospheric strata through which the phenomenon is observed, also whatever be the distance from that body to the sun, or to the planet; finally, whatever be the sensibility of the observer's sight, all which circumstances considerably influence the time of apparent disappearance.
Carpenter respecting the nature of the Eozoön be well founded, aquatic animals existed at a period as far antecedent to the deposition of the coal as the coal is from us; inasmuch as the Eozoön is met with in those Laurentian strata which lie at the bottom of the series of stratified rocks.
I am satisfied now, from what I have seen, that it is really a rupture of the whole strata all the way down. That's the one weak point that the imprisoned water is sure to find, and that's where the borer will tap it in the new well that the earthquake itself has sunk."
Strata are said to overlap when an upper bed extends beyond the limits of a lower one.
From these facts trace the history of the oscillations of the region. The oscillations which we have just described leave the strata not far from their original horizontal attitude. Here, on either side of the valley V, we find outcrops of layers tilted at high angles. Sections along the ridge r show that it is composed of layers which slant inward from either side.
Observations have already been made on the distinctness of the organic remains of the Oolitic and Cretaceous strata, and the proportion of species common to the different members of the Oolite. Between the Lower Oolite and the Lias there is a somewhat greater break, for out of 256 mollusca of the Upper Lias, thirty- seven species only pass up into the Inferior Oolite.
At Port Desire, the gravel rested sometimes on the basal formation of porphyry, and sometimes on the upper or the lower denuded tertiary strata. It is remarkable that most of the porphyritic pebbles differ from those varieties of porphyry which occur here abundantly in situ.
But just imagine a Dorsetshire peasant sending his boy to a University!" We suppose that the large holdings of land are the effect of wrongs and abuses now wholly in the past, and that the causes for their increase are no longer operative, but are something like those geological laws by which the strata under them formed themselves.
It is not so much the number of professed prostitutes that alarms the student of sociology, as the brutal indifference to even the semblance of sexual purity which is taking possession of our social aristocracy, and which poison, percolating through the underlying strata, threatens to eliminate womanly continence from the world.
The inclination, although slight, is remarkably persistent, and the thickness of the strata remains almost constant. The beds, therefore, extend from very high altitudes to very low ones, and often the formation which is exposed to view at the summit of an incline is lost to view after a few miles, being covered by some later formation, which in turn is covered by a still later one.
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