As I distrust my own half-barometical measurements, I have vainly implored travellers, these fifty years past, to have a new series of trigonometrical observations made of the summit of Chimborazo.
Indian Trigonometrical Survey; to Commendatore NEGRI the indefatigable President of the Italian Geographical Society; to Dr.
The Signory fought hard with the Bishop, but he fled to the Papal Court and refused all concession.
Gog and Magog were set in the far north or north-east, because it was said again in Ezekiel: "Ecce Ego super te Gog Principem capitis Mosoch et Thubal .
More general cases of trigonometrical series, in which the multiples are given as the roots of certain transcendental equations, were also considered by Fourier.
The annual report on the great trigonometrical survey of India contains particulars which shew that surveying in India is by no means holiday pastime.
It seems likely that trigonometrical surveying may be carried on with less difficulty in future; for an Italian officer of engineers, Lieutenant Manzi, has proved that the triangulations can be photographed.
From Anenous we had to trend to the north-west, past Tarabies, Lekkersing and the northern trigonometrical beacon.
I left the track and climbed to the top of the Koeberg, the hill from which the big beacon--that farthest outpost of the trigonometricalsurvey on this side--springs like a startled finger.
During the earlier years of his manhood he was engaged in the trigonometrical survey of the kingdom of Naples, where, for a time, he had charge of an observatory or some other astronomical station.
The data for a trigonometrical calculation are to be obtained by observing, in a very accurate manner, a series of angles of elevation and depression on a line between the points, the relative levels of which are to be obtained.
Thus, in their trigonometricalsurveys Bouguer and his associates never calculated the third angle by the observation of the two first, but always observed all three.
This gigantic trigonometrical undertaking was commenced twenty years before the end of the seventeenth century, was interrupted, and recommenced, and finally finished towards 1720.
He first made a trigonometrical survey of the district, and delineated its physical geography with minute accuracy and admirable graphic power.
I availed myself of trigonometrical measurements also with a good theodolite wherever this was possible, in which case such a survey engaged my whole attention, and my route was often directed according to the position of good points.
The trigonometrical and topographical sections stand in intimate connection with each other.
The measurement of a base is made by such means as readily offer themselves (generally by pacing), and the trigonometrical points are fixed simply by protracting angles observed with a box sextant or compass.
The solution of all the cases in plane and spherical trigonometry; analytical investigation of trigonometrical formulæ; and the construction of trigonometrical tables.
The examination in these subjects will be limited to determining heights and distances by ground problems, and the ordinary trigonometrical calculations with the aid of logarithms.
In explaining the use of trigonometrical tables, the pupil must be able to tell with what degree of exactness an angle can be determined by the logarithms of any of its trigonometrical lines.
How are the trigonometricalfunctions of the different quadrants of the circle indicated?
In the great trigonometrical survey of India the theodolites used in the more important parts of the work have been of 2 and 3 ft.
In India no expense is spared in making permanent the principal trigonometrical stations--costly towers in masonry being erected.
It is essential that every trigonometrical station shall present a fine object for observation from surrounding stations.
The precise determination of the altitude of his station is a matter of secondary importance to the geodesist; nevertheless it is usual to observe the zenith distances of all trigonometrical points.
If they were visible, trigonometrical measurements on the hill enable the place of descent to be located, and then the kites and meteorograph are sent for and the wire is reeled up.
If, as is generally the case, the lines of sight did not meet, the trigonometricalformulae gave the height of a point midway between the crossing of these lines.
The so-called "luminous clouds" seen at night during the same period, and which were probably these same dust particles still illumined by the sun, were found by trigonometrical measurements to have about the same altitude.
About the same time attempts were made at Kew Observatory to measure clouds by photography, and in 1885 probably the first trigonometrical measurements in America were made at Cambridge, Mass.
On the flat Magilligan peninsula, which forms the eastern horn of Lough Foyle, the base-line of the trigonometrical survey of Ireland was measured in 1826.
In 1705 appeared the original edition of Sherwin's tables, the first of the series of ordinary seven-figure tables of logarithms of numbers and trigonometrical functions such as are in general use now.
The first calculation or publication of Briggian or common logarithms of trigonometrical functions was made in 1620 by Edmund Gunter, who was Briggs's colleague as professor of astronomy in Gresham College.
Among the most useful and accessible of modern ordinary seven-figure tables of logarithms of numbers and trigonometrical functions may be mentioned those of Bremiker, Schron and Bruhns.
Since local deflections of the plumb-line were suspected at Feaghmain, the most westerly station, the longitude (with respect to Greenwich) of the trigonometrical station Killorglin at the head of Dingle Bay was shortly afterwards determined.
The principal work containing the methods and results of these operations was published in 1858 with the title "Ordnance Trigonometrical Survey of Great Britain and Ireland.
For further details see Account of theTrigonometrical Survey of England and Wales.
The survey is detailed in eighteen volumes, published at Dehra Dun, and entitled Account of the Operations of the Great Trigonometrical Survey of India.
By these tables Napier superseded the long and laborious arithmetical operations which great calculators had previously to undergo, and which the most simple trigonometrical operations demanded.
Beer and Mädler began at Berlin in 1830 their great trigonometrical survey of the lunar surface, as yet neither revised nor superseded.
While executing a trigonometrical survey (the first attempted) of the disc, then of the unusual size of 25" across, G.
Its elevation above the common level, ascertained by a trigonometrical measurement, is about eight thousand five hundred feet.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "trigonometrical" in a variety of sentences. We hope that you will now be able to make sentences using this word.
