I carried the chronometer in my hand.

The chronometers of all the whale ships were brought to Mr. Mitchell, on their return from a voyage, to be "rated," as it was called.

"For the determination of the longitude of Valencia, which was carried out in this year, various methods were discussed, but the plan of sending chronometers by mail conveyance was finally approved.

Chronometers from Erebus and Terror.

For this purpose it was essential that facilities should be given for landing chronometers at Greenwich.

On Mar. 31st, &c. 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.

Chronometers on trial are rated every day, by comparison with one of the clocks sympathetic with the Motor Clock.

Watches, as electricians know to their cost, are liable to have their steel work accidentally magnetised, and the best chronometer under those conditions can never again be trusted to keep correct time.

"In the inferior departments of the Admiralty, especially in the Hydrographic Office (then represented by Captain Beaufort) with which I was principally connected, the Observatory was considered rather as a place for managing Government chronometers than as a place of science.

Their trials gave a greater difference, by a half second, between the two meridians, than we had obtained on a former visit by carrying chronometers to and fro.

"I find letters from Dr Robinson and Col. Colby about determining longitudes of certain observatories by fire signals: I proposed chronometers as preferable.