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Updated: June 14, 2025
Four months after the discovery of aerostats, he had invented the valve, which permits the gas to escape when the balloon is too full, or when one wishes to descend; the car, which allows the machine to be easily managed; the network, which encloses the fabric of the balloon, and prevents its being too heavily pressed; the ballast, which is used in ascending and choosing the spot of descent; the coat of caoutchouc, which renders the silk impermeable; the barometer, which determines the height attained; and, finally, the hydrogen, which, fourteen times lighter than air, allows of ascension to the most distant atmospheric layers, and prevents exposure to aerial combustion.
When used to relieve pain in the stomach, or as a warm application in cases of inflammation of the chest, they should be covered with some impermeable material, and will then not require to be changed oftener than every six hours.
For though I have no wish to be Queen of England or only for a moment I would willingly sit beside her; I would hear the Prime Minister's gossip; the countess whisper, and share her memories of halls and gardens; the massive fronts of the respectable conceal after all their secret code; or why so impermeable?
For instance, “while soluble crystalloids are always highly sapid, soluble colloids are singularly insipid,” as might be expected; for, as the sentient extremities of the nerves of the palate “are probably protected by a colloidal membrane,” impermeable to other colloids, a colloid, when tasted, probably never reaches those nerves.
Since then J and I walked down into the Strand, and found ourselves unexpectedly mixed up with a crowd that grew denser as we approached Charing Cross, and became absolutely impermeable when we attempted to make our way to Whitehall.
Verrian asked himself, as he watched her twittering back at those girls, and shedding equally their thanks and praises from her impermeable plumage, how she would have behaved if Miss Shirley's attempt had been an entire failure. He decided that she would have ignored the failure with the same impersonality as that with which she now ignored the success.
None of our guesses ever stuck to him, and we had grown weary of rediscovering that anything so simple could also be so impermeable to our ingenuity. In a word, Crocker's case was as much plainer than Emma's as noonday is than twilight.
In deep and loose soils they used sometimes, just as we do now, porous clay pipes; but when the subsoil was formed of compact and nearly impermeable matters, they employed a system of drainage, the extent and grandeur of which astonishes us.
For if the rock cannot be proved to have been impermeable to and barred against the entrance of living creatures, the objector may proceed to show the possibility of the toad having gained admission, under certain notable circumstances, to its prison-house.
And since to these advantages of personal appearance he superadded a quick intelligence, and no little activity and liveliness, he was sure to meet with flattery and observation. But there was something in Julian's nature which, by God's grace, seemed to secure him from evil, as though he were surrounded by an atmosphere impermeable to base and wicked hearts.
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