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We find to-night, on comparing the readings of the barometers, that the walls are about 3,000 feet high more than half a mile an altitude difficult to appreciate from a mere statement of feet.
The sand is there merely as what the logicians call, in their cheerful way, 'a separable accident'; the essential of a desert, as such, is the absence of vegetation, due to drought. The barometer in those happy, too happy, regions, always stands at Set Fair. At least, it would, if barometers commonly grew in the desert, where, however, in the present condition of science, they are rarely found.
By means of preconcerted signals, the inmates could have themselves drawn up, let down, or carried laterally in whatever direction they pleased. By barometers and other instruments they could readily ascertain the pressure of the air and water, also how far they had descended and at what rate they were moving. The Captain, from his bridge, carefully superintended every detail of the operation.
For the purpose of building cabins, repairing boats, and meeting other exigencies, we are supplied with axes, hammers, saws, augers, and other tools, and a quantity of nails and screws. For scientific work, we have two sextants, four chronometers, a number of barometers, thermometers, compasses, and other instruments.
Nor did he think again about it, until, in bed, on his sleeping porch, he took a glance at his barometers and thermometers, and prepared to settle down to the solution of the electrical speculation that had been puzzling him. Then it was, as he peered across the great court to his wife's dark wing and dark sleeping porch to see if she were still waking, that Ernestine's remark again echoed.
Our essayist discloses but an imperfect inkling of knowledge on the subject of capillarity in barometers, when he speaks of this complex action as equivalent to the attraction between the mercury and the glass tube; and he commits a yet graver mistake, practically speaking, in reiterating the long exploded error, that 'the weight of the atmosphere at the level of the sea is the same all over the world. No fact in Meteorology is better established than that the mean pressure at the sea-level is different for different latitudes.
Bell, the collector of the district, to whom we were greatly indebted for furthering us on our voyage: boats being very difficult to procure, we were, however, detained here from the 16th to the 19th. I was fortunate in being able to compare my barometers with a first-rate standard instrument, and in finding no appreciable alteration since leaving Calcutta in the previous April.
"The supporting power being estimated at 2500 pounds, and the united weights of the party amounting only to about 1200, there was left a surplus of 1300, of which again 1200 was exhausted by ballast, arranged in bags of different sizes, with their respective weights marked upon them by cordage, barometers, telescopes, barrels containing provision for a fortnight, water-casks, cloaks, carpet-bags, and various other indispensable matters, including a coffee-warmer, contrived for warming coffee by means of slack-lime, so as to dispense altogether with fire, if it should be judged prudent to do so.
The balance was destroyed, the former harmony gone. Smoke, most sensitive of barometers, had been the first to feel it, but the dog was not slow to follow suit, for on looking down he noted that Flame was no longer asleep. He was lying with eyes wide open, and that same instant he sat up on his great haunches and began to growl. Dr.
Unless the eyes peering into the night were bad barometers of their owner's inner state, he was in a panic of fear. "Love o' Gawd, d-don't shoot!" he chattered. "I ain't nobody but the caretaker." He backed slowly away, followed by Lindsay. The barrel of the thirty-eight held his eyes fascinated. By the light of his flash Clay discovered the man to be a chalk-faced little inconsequent.
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