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Updated: May 29, 2025
M. always stands for angular or trigonometrical measurement. Ba. M. always stands for barometrical measurement. Est. always stands for estimation by the Officers of the Survey. Terrace 2. 200-220 An. M. Terrace 3. 350 An. The lowest plain corresponds with that at San Josef with the recent shells on its surface. M. Terrace 2. 330 An. M. Terrace 3. 580 An. M. Terraces 4, 5 and 6 not measured.
By this system the tedious arithmetical operations necessary in astronomical calculations, especially those dealing with the trigonometrical functions of angles, were so much simplified that Laplace declared that by this invention the life-work of an astronomer was doubled.
We were ascending the hill, which was found by trigonometrical measurement to be eight hundred and forty-seven feet above the level of the sea, and on which we found no mineral production but sandstone and clay iron-stone, when a breeze sprung up from the eastward, bringing up the Griper, which had been left several miles astern.
An undersized, lean, wizen-faced man, with an immense bald head, as round and smooth and shining as a giant soap-bubble, and a pair of beady black eyes, set close together, so that he resembled a gnome of amazing brain capacity and prodigious power of concentration, sat bent over a writing desk with a huge sheet of cardboard before him, on which he was swiftly drawing geometrical and trigonometrical figures.
This learned work contains the result of Humboldt's astronomical and trigonometrical observations on the lunar distances, the eclipses of the satellites of Jupiter, the transit of Mercury, and upwards of five hundred elevated points in the New World, taken from barometrical observations, with all the requisite allowances and calculations carefully made.
The length of each of these lines is mathematically the same, for they have been determined with as much accuracy as the base of the first triangle in a trigonometrical survey. That done, the two boards were erected on the same day in the center of the conference room, and the two candidates, each armed with a fine needle, marched towards the board that had fallen to his lot.
They insisted that the coveted islands were included in their portion of the great Borgian grant. As there had hardly yet been time to make a trigonometrical survey of an unknown world, so generously divided by the pope, there was no way of settling disputed boundary questions save by apostolic blows.
The walls had a necromantic look, hung round with barometers of different kinds, drawings of surprising inventions, wide maps of far countries in the New World, containing vast empty spaces in the middle, with the word DESERT diffusely printed there, so as to span five-and-twenty degrees of longitude with only two syllables, which printed word, however, bore a vigorous pen-mark, in the Doctor's hand, drawn straight through it, as if in summary repeal of it; crowded topographical and trigonometrical charts of various parts of Europe; with geometrical diagrams, and endless other surprising hangings and upholstery of science.
In the year 1820, in the course of some investigations connected with the Trigonometrical Survey of Great Britain, and conducted by a deputation of scientific persons from London and Paris, M. Fresnel exhibited from the French side of the channel, by means of his lens and a large lamp, a powerful light which was observed by the English across the channel.
Swift suggested as a suitable subject for a philosophical writer a history of human projects which were never carried out; the historian of modern Japan finds these at every turn. Where, for example, are the results of the great surveys, trigonometrical and others, which were commenced in Yezo and the main island about ten years ago?
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