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It seemed so compressed and impermeable that one could not fancy how even a thunderbolt could shatter it, or the wildest blast of any hurricane dissipate its enormous depth. But as yet it had not enveloped the peaks themselves. On them the sun yet shone, and where the boys stood they were still bathed in the keen yet blue and sunny air, islanded far up above the noiseless billows of surging cloud.
De Vries imagined that the contractions noticed in the protoplasm of cells placed in saline solutions were due to a phenomenon of osmosis, and, upon examining more closely certain peculiarities of cell life, various scholars have demonstrated that living cells are enclosed in membranes permeable to certain substances and entirely impermeable to others.
In the interior of the cylinder there is a metallic cup which is connected with the central reservoir by an impermeable membrane, I. These three parts form a closed chamber, into which the pressure comes through a tube, F, provided with a cock. A spring, M, which counteracts the pressure, is arranged between the crosspiece, G, and the bottom of the reservoir.
Struck and rebounded, then struck and clung hungrily, licking out over that impermeable surface in darting tongues of red flame as the surprised Nerado doubled and then quadrupled his power.
The Greek word for shadow is "skia," and the proper rendering, therefore, of shadowgraph is "skiagraph," corresponding to photograph. The first question that meets us in the use of the method in medicine is what normal constituents of the body are permeable or impermeable to the X rays.
Instead of trunks, they had two large bags, two saddle-bags, and two valises, all of thick Russian leather, fastened with padlocks, and impermeable to water. Instead of mattresses, each had a carpet and coverlet rolled in painted canvas, that served as a floor at night, when it was their lot to lie on the ground. Each had an ample Turkish pelisse, lined with the fur of the Caucasian fox.
Thus in La Brenne, a tract of 200,000 acres resting on an impermeable subsoil of argillaceous earth, which ten centuries ago was covered with forests interspersed with fertile and salubrious meadows and pastures, has been converted, by the destruction of the woods, into a vast expanse of pestilential pools and marshes.
You observe that the land all has a slope hitherward from the distant range of mountains, and that between us and the sea there is a chain of hills. The metropolis lies at the lower edge of a vast basin, and it must be that the relatively porous surface, over many thousands of square miles, is underlain by an almost unbroken shell of rock, impermeable to water.
Unhappily the natives devote themselves to this employment more than to agriculture. Yet the soil on the banks of the Cassiquiare is excellent. We find there a granitic sand, of a blackish-brown colour, which is covered in the forests with thick layers of rich earth, and on the banks of the river with clay almost impermeable to water.
It has on its tail a pot of cosmetic, a bottle of hair-oil, a fatty gland from which the beak obtains an ointment wherewith it preens the feathers one by one and renders them impermeable to moisture. A great expender of energy by reason of the exigencies of flight, it is essentially, chilly creature that it is, better-adapted than any other to the retention of heat.
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