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It was proved by barometrical admeasurement, that the cataract of the Macquarie was 680 feet above the level of the sea, and, in like manner, it was found that the depot of Mr. Oxley, on the Lachlan, was only 500, there being a still greater fall of country beyond these two points.
Dick Sand knew all that perfectly well, as he had ascertained for himself in different circumstances of his sailor's life, which made him very skilful in putting himself on his guard against all contingencies. Now, just toward the 20th of February, the oscillations of the barometrical column began to preoccupy the young novice, who noted them several times a day with much care.
We found the mountain to be 4860 feet above the sea, barometrical admeasurement, and the flagstaff itself in latitude 13 deg. 18' N. and longitude 87 deg. 45' W. We obtained bearings on nearly all the volcanic cones on the plain of Leon, as also on many of the detached mountain-peaks of Honduras and San Salvador, as the commencement of a system of triangulations which subsequently enabled us to construct the first map of the country at all approximating to accuracy.
At Potosí the boiling-point is still lower, being 188°, and the barometrical column stands at 18°. Indeed, the experiment is often exhibited at our chemical lectures, of a flask containing a small quantity of water, which, exhausted of air, is made to boil by the ordinary heat of the hand.
However, during the first week of April, after a sudden barometrical fall, a renewed rise was marked by a heavy gale of wind, lasting five or six days; then the needle of the instrument remained stationary at a height of twenty-nine inches and nine-tenths, and the weather appeared propitious for an excursion.
It is a kind of barometrical measurement. We do not gauge the weather by adding together the figures of all the storm-glasses in the world; the rise or fall of the mercury in any one of them, especially the best one among them, comprehends the whole. Here is the problem of pain in a nutshell.
Dain Matara, the Bugis, Excursions in Celebes. Dispute with the Rajah's son-in-law. Baboon shot. Appearance of the country. Visit the Resident. Barometrical observations. The Bugis. Geography. Coral reefs. Visit the Rana of Lamatte. Population and products of the country.
But how had all this been accomplished? The enemy could not possibly have depended on the fog from the outset. Nevertheless an unusual barometrical depression had brought in its train several days of disagreeable, stormy weather. The Japanese had been fully prepared for a battle with the San Francisco forts and with the few warships stationed in the harbor.
On their way down to the Bituminous Lake, Schubert and his companions took some other barometrical observations, and were very much surprised to find their instrument marking ninety-one feet below the Red Sea, the levels gradually decreasing in height as they advanced.
The barometer was a little lower than usual; but the progress of the horary variations or small atmospheric tides, was no way interrupted. The mercury was precisely at the minimum of height at the moment of the earthquake; it continued rising till eleven in the evening, and sank again till half after four in the morning, conformably to the law which regulates barometrical variations.
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