Therefore, when noon approaches, his chronometers and sextant are got out, and at the moment when the sun crosses the meridian the time is taken.
It was not till nearly a century later that Thomas Earnshaw produced the "compensation balance," now generally used on chronometers and high-class watches.
The average reading of the chronometers is taken to work by.
If this moment happens to coincide with four o'clock on the chronometers he is as far west of Greenwich as is represented by four twenty-fourths of the 360 deg.
Quite extraordinary feats of time-keeping have been recorded of chronometers on long voyages.
Experienced adjusters of chronometerscan tell by listening if the escape-wheel tooth attacks the impulse jewel properly, i.
Those who have had extended experience with chronometers cannot fail to have noticed a gummy secretion which accumulates on the impulse and discharging stones of a chronometer, although no oil is ever applied to them.
It is to be understood of course that the variation of any of the chronometers will be but slight if they are good instruments.
Such tests are constantly made at the Royal Observatory in England and elsewhere, and the best chronometers bear certificates as to their accuracy and as to their rate of variation.
Two chronometers would obviously be not much better than one, since there would be no guide as to whether any variation between them had been caused by one running too fast or the other too slowly.
By progressive stages of improvement, it was brought by the inventor himself to so high a point of perfection, that it continues to be the model followed in the construction of the best chronometers of the present day.
On winding thechronometers this morning, found the chain of 2139, by Arnold, was broken.
You'll excuse me, ladies, but the chronometers must be attended to.
It was not until the whole system of taking sights for chronometers had been satisfactorily explained, that the lady recovered her good-humour.
Much to the satisfaction of Captain Drawlock, the chronometers and the ladies were safe on board, and the Bombay Castle proceeded to the Downs, where she was joined by the purser, charged with despatches of the august directors.
The other had been secured by Miss Tavistock, much to the gratification of the captain, who thus had his unmarried ladies and his chronometers both immediately under his own eye.
He talked much of his responsibility, and divided the whole of his time between his chronometers and his young ladies; in both of which a trifling error was a source of irritation.
So excellent was this escapement considered a few years back, that chronometers were made upon the principle, and placed in the Royal Observatory for public trial.
All around the upper one (except the front, which has a glass door through which the chronometers and watches are seen without opening it) is one inch of water.
It is by means of carefully-made and exact chronometers that we calculate the distance and relations of the various heavenly bodies to ourselves and to one another.
The period had now arrived for the making of marine time-keepers sufficiently accurate for nautical use, and styled chronometers because they are most accurate time-measurers.
It has a chamber thirteen inches high, eleven inches broad, and seven inches deep for the reception of chronometers and watches.
The observations were taken upon Bottle Rock, the largest of two rocky islets at the north end of South-west Bay; but the results were so doubtful and unsatisfactory, that the longitude determined by the chronometers was preferred.
For justice decrees that the time spent on the work should be counted by the minute, almost as by the chronometers of psychological experiment.
After a pleasant stay of twelve days, we left Mauritius, on May 17th, as soon as the last set of sights for rating the chronometers had been obtained, and in due time rounded the north end of the island to a light wind off the land.
Sights for rating the chronometers to get which was the only object in coming here, having been obtained, we left for Goold Island in the afternoon.
The comparisons of thechronometers this day indicated that Arnold's Nos.
Fresh rates were procured for the chronometers and their errors determined for Greenwich time, by which the survey to the northward was carried on.
The observations we obtained here shewed that the chronometers had varied their rates a little in consequence of the jolting of the carioles, but their errors and rates were ascertained previous to our departure.
I reported to the Admiralty on the selection of chronometers for purchase, from a long list: this was an important beginning of a new system.
It was found now that the reliance on the steadiness of the chronometers was too great; and a new method was devised, in which for each series the chronometers should make four journeys and have four comparisons above and two below.
In March a pigeon-house was made for exposure of chronometers to cold.
In the first few years after the strict and systematic examination of competitive chronometers, beginning with 1856, the accuracy of chronometers was greatly increased.
With regard to Chronometers it is stated that 'By use of the Chronometer Oven, to which I have formerly alluded, we have been able to give great attention to the compensation.
As soon as they arrived on board, Captain Pinder examined the chronometers and pronounced them to be excellent ones.
I shall, of course, try and find out who was the captain of that ship whose chronometers he bought.
It needed but a glance to show that the latter were two chronometers and three quadrants.
It is true that Mr. Embleton was offered by one of their chiefs some chronometers and the contents of a sea-chest.
Those chronometers would never have floated, and them polished cases have never been in the water.
While this transaction had been going on, Jim had carried the boxes containing the chronometers and quadrants to his comrades.
I have bought the chronometers and quadrants, and they have certainly not been in the water; also the contents of a sea-chest, which I divided among the men.
Keep in each chronometer case or in a book nearby the error and daily rate of all chronometers on board.
As chronometers have their face marked only from 0 to 12 as in the case of an ordinary watch, it is necessary to transpose this watch or chronometer time into astronomical time.
To obviate the possibility of this, we had some chronometers constructed by Messrs.
The sea-watches or chronometers of Breguet are famous throughout the world.
Breguet did still more: he found means to preserve the regularity of his chronometers even in case of their getting any sudden shock or fall, and this he did by the parachute.
Chronometers were so expensive and so hard to obtain that few New England ships had them until more than a half a century later.
Today, fine watches serve for short trips and chronometers are carried by nearly all vessels making long voyages.
The chronometers do that now, so let us conduct all business to that time.
All clocks and watches would show the same time as ship's chronometers do now.
For the fact of that variance is a presumption that, with respect to China, the Chinese watches must be all right; and consequently as the China watches are right as to China, so the Greenwich chronometers must be wrong as to China.
Captain Cook's object in visiting Matavai Bay was that Mr Wales, the astronomer, might correct the chronometers of the ship by a known longitude.
The Board of Longitude also amply furnished the expedition with the best astronomical and other instruments which might be required, and with four watch-machines, as chronometers were then called.
Karain looked slowly from face to face, and then the silence became so profound that we all could hear distinctly the two chronometers in my cabin ticking along with unflagging speed against one another.
To ascertain the Greenwich time the ship carries a chronometer which has been carefully rated before starting, and, as a precaution, two or three chronometers are usually provided to guard against the risk of error.
It is important to have the means of testing the chronometers during the progress of the voyage; and it would be a great convenience if every captain, when he wished, could actually consult some infallible standard of Greenwich time.
I looked at the chronometers and instruments, and of you all as I looked at the beautiful vessel slipping along through the water with scarce a stitch of canvas.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "chronometers" in a variety of sentences. We hope that you will now be able to make sentences using this word.
