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Updated: May 12, 2025
Compensation for wear is a part of the mechanist's art that appears just as essential to him as compensation for variation of temperature is to a maker of chronometers. In the construction of sewing machines to be run in factories by power at their utmost speed, such a system is of the greatest importance.
No doubt owners of vessels that have been missing will call at the office to inspect the chronometers. I do not say that anyone would have a legal right to them; they have been absolutely lost and gone out of their possession, and you have bought them in the way of fair trade.” “If they wish to have them back again, sir, of course I will give them up.”
The dampness had caused the growth of lichens all over the trees, and the steep descent was so slippery that two boys fell, and he who carried the chronometers, twice: this was a misfortune, as it altered the rates, as was seen by the first comparison of them together in the evening.
Our first observation by chronometers, on our arrival at Matarai, gave the longitude of Venus Point as 149° 20' 30"; the true one, as given by Admiral Krusenstern on his map, is 149° 27' 20"; consequently, the error of our chronometers was 6' 50". This correction has been made in all the longitudes taken by us in the dangerous Archipelago.
We received every attention from the hospitable and inoffensive natives, who supplied us with pigs, fowls, and vegetables, refusing to accept any thing in return. We returned to Pa-tchu-san to rate our chronometers, and sailed on the same day. The next morning we landed on Hoa-pen, an island, but the cloudy weather prevented us from obtaining the latitude.
The longitudes have been estimated by the use of chronometers, but the sudden recall of the party left the latter part of the task incomplete. Any defect arising from the latter cause may be considered as in a great degree compensated by the connections referred to with the work of Major Graham and the surveys of the previous years.
Now, on this day, though he had not changed the hands, he found that his watch exactly agreed with the ship's chronometers. His triumph was hilarious. He would have liked to know what Fix would say if he were aboard! "The rogue told me a lot of stories," repeated Passepartout, "about the meridians, the sun, and the moon! Moon, indeed! moonshine more likely!
Fechner's primitive researches made it possible to produce instruments so exact that they can measure the sound made by a drop of water falling from the height of a meter, while Wundt's researches have resulted in chronometers which can measure the thousandth part of a second.
He raised the lid of this, and three chronometers appeared; at the same moment three of the men produced their watches, and a comparison was made and entered in a book. After each watch had been compared, its owner went outside, taking his watch with him.
Since this period, chronometers have been much improved, and excellent ones are very generally used: perhaps the most trying circumstances in which any were ever placed, existed during the voyage for the discovery of a northwest passage by Captain Parry; and then most of those he had with him were found to be extremely accurate.
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