The theodolite is then placed over P1, and the telescope turned to A; the horizontal circle is then moved through 180 deg.
The direction of the meridian is determined either by a theodoliteor a portable transit instrument.
A fine mark on this disk is brought vertically under the end of the bar by means of a theodolite which is planted at a distance of 25 ft.
The probable error of a single observation of a fine object with this theodolite is about 0".
In placing the theodolite over a station to be observed from, the first point to be attended to is that it shall rest upon a perfectly solid foundation.
The horizontal angles are also influenced by the deflections of the plumb-line, in fact, just as if the direction of the vertical axis of the theodolite varied by the same amount.
Note: The surveyor's transit differs from the theodolitein having the horizontal axis attached directly to the telescope which is not mounted in Y's and can be turned completely over about the axis.
Defn: Any sight or reading of the leveling staff, except the backsight; any sight or bearing taken by a compass or theodolitein a forward direction.
On the day following that on which the stakes were driven in, the theodolite was placed in the same position, and the distances to which the stakes had moved from their original positions were accurately determined.
His theodolite was placed upon the ice, and in seventeen days he found that the ice 90 feet nearer the centre than the theodolite had moved 26 inches past the latter.
This done, I descended for a quarter of a mile, when I again climbed the flanking rocks, placing my theodolite in a couloir, down which stones are frequently discharged from the end of a secondary glacier which hangs upon the heights above.
At a quarter past eleven I had my theodoliteagain fixed, and ranging the telescope along the line of pickets, I saw them all standing.
The work was done; I struck my theodolite and ascended to the hotel; the greatest depth of snow through which I waded reaching, when I stood erect, to within three inches of my breast.
A previous inspection of the glacier through the telescope of ourtheodolite induced us to fix on a place which, though much riven, still did not exclude the hope of our being able to reach the other side.
The portion of the theodolite made use of is easily understood.
To measure the motion of the line of stakes, we returned to the place a day or two afterwards, and by means of the plummet were able to make the theodolite occupy the exact position which it occupied when the line was set out.
Adjacent to my theodolite was a stump of pine, from which I had the snow removed, in order to have something to kick my toes against when they became cold; and on the stump was placed a blanket to be used as a screen in case of need.
The ice-floes are quite steady in really thick pack-ice, and the theodolitecan be set up and levelled as well as on dry land.
The theodolite employed was a light 3´´ Vernier instrument by Carey Porter, intended for sledging work.
This error affects observations both with the theodolite and the sextant, but in the case of the sextant another cause of error occurs.
The temperature was very low this morning, and handling the theodolite was not too warm a job for the fingers.
For determining the position in drifting pack-ice, the theodolite proved to be a more generally useful instrument than the sextant.
Wheeler had come a short way along the ridge until he got a good view-point, when he stopped to set up his theodolite and camera for a station, after which he came along no further.
The theodolitemay not be levelled with perfect accuracy.
The telescope of the theodolite may not be absolutely perfect.
Here he found the gale very troublesome, his theodolite being nearly blown over several times.
The graduations on the circle of the theodolite may not be quite accurate.
He has a theodolite which we use for fine work; and I've a little pocket-compass, given me by an old lady a few years ago.
The common compass they use doesn't make as fine angles as the theodolite or transit instrument does; and then the chain varies a trifle in length with every variation of temperature; the metal contracts and expands, you know.
A battle took place, the collier was soundly pummelled, but the natives poured in volleys of stones upon the surveyors and their instruments, and the theodolite was smashed to pieces.
A famous fighter among the colliers, determined not to be outdone, marched up to the theodolite to capture it.
At a sight of the theodolite their fury knew no bounds.
The theodolite was then moved to 1,000 feet, and, if found necessary, the adjustment was repeated.
The azimuth or true direction of some line is also obtained from star observations, usually by observations with a theodolite on a circumpolar star.
The observations with the theodolite having been completed we obtained some soundings and returned to the ship.
Then "Paul, is there a theodolite or anything like that left lying around in here?
He handed the theodolite telescope and the laser milling-head to Paul.
Practical Cherry suggested pitching the tent as a mark of our whereabouts, and having done this I mounted the theodolite to watch Crean through the telescope.
Captain Scott had asked me if possible to take some theodolite observations for the determination of the position of Bluff Camp.
I proceeded with the theodolite to a height near Cape Nelson and from it I intersected that cape and also Cape Bridgewater, Cape Sir William Grant, the islands to the eastward, etc.
I hastily levelled my theodolite but the scene, although sublime enough for the theme of a poet, was not at all suited to the more commonplace objects of a surveyor.
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.
With the spirit-level of my theodolite I found that the most depressed part extended about due west by compass, a circumstance which first made me imagine the Lachlan might have some channel in that direction.
There was just convenient room on it for the theodolite and, as it afforded a most satisfactory and commanding view, well suited for the purpose of surveying, it seemed to have been aptly named after a distinguished geographer.
I was however more desirous to level my theodolite on that summit first, and thus obtain valuable materials for the construction of an accurate map of the whole country around it.
We had ascended but little way, when the unfortunate theodolite escaped from my coxswain, rolled down the ravine, and was much damaged.
In the afternoon I tried to go up the mountain I had ascended on Tuesday, to bring down a theodolite which I had left at the top; but the wind obliged me to return unsuccessful.
In a comparatively mild and agreeable spot, I again set up the theodolite and barometer, while some of the party employed themselves in fruitless attempts to kindle a fire.
The theodolite had been left near the top since the 28th, each day having been too bad to use it.
I again went up Mount Skyring, taking a theodolite with me; and as the day was perfectly clear, and free from clouds, every point of land was visible, which can at any time be seen from that summit.
A very severe task we had, but at last gained the highest pinnacle, where there was just room to place the theodolite and kneel by it, at the risk of a puff of wind canting us over either side.
At first the Diego Ramirez Islands were seen, but before I could get the theodolite fixed and adjusted, the horizon became hazy.
The name of a friend whom I taught in his boyhood to handle a theodolite and lay a chain, and who afterwards turned his knowledge to account on the glaciers of the Alps, occurs frequently in the following pages.
Hawkins, who had halted for a day at Thun, had arrived; our guide had prepared a number of stakes, and on Monday morning we mounted our theodolite and proceeded to the Lower Glacier.
Lauener was unwilling to proceed with us to Zinal: we resolved to give Bennen his chance: the theodolite was packed up and despatched to Geneva, and we set off for Breuil, to try the Matterhorn.
Both these instruments were taken on the sledge journey; but the theodolite was not used, owing to the low altitude of the sun.
Had the expedition been delayed on the return until May or June, the theodolite would then have been of value in determining position and variation of the compass.
Upon our return we landed at Caper Point near the bottom of the bay; where, on taking some bearings, a considerable local magnetic attraction was detected, for the needle of the theodolite was nearly eight degrees in error.
The theodolite at A was directed towards C, that at B was kept on the boat.
The observer A sets his theodolite in the direction AE, and gives a signal to drop a float.
A battle took place, the collier was soundly pommeled, but the natives poured in volleys of stones upon the surveyors and their instruments, and the theodolite was smashed in pieces.
Unfortunately we did not succeed in getting any astronomical observation on this trip, as the theodolite we had brought with us went wrong, but later observations on several occasions gave 79° 59' S.
Another very good proof seems to be afforded by the large theodolite that Prestrud used.
During the two weeks that followed October 20 there were only three or four days that offered any chance of working with the theodolite and plane-table.
Lieutenant Prestrud studied the use of the pendulum apparatus under Professor Schiotz and the use of the astronomical theodolite under Professor Geelmuyden.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "theodolite" in a variety of sentences. We hope that you will now be able to make sentences using this word. Other words: bevel; compass; gauge; protractor; quadrant; sextant; transit
