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A73    Periodical contribution:     FitzRoy, R. 1836. Sketch of the Surveying Voyages of his Majesty's Ships Adventure and Beagle, 1825-1836. Commanded by Captains P. P. King, P. Stokes, and R. Fitz-Roy, Royal Navy. Journal of the Geological Society of London 6: 311-343. (Communicated by John Barrow)   Text   Image   PDF
A cushion, wool, hair, or any such substance, is preferable to a solid bed; but I can think of nothing better than plain dry sawdust. Many chronometric measurements have caused errors, and great consequent perplexity, in the following manner: The chronometers were rated in air whose average temperature was (let us suppose) 70 . They were then carried through air either considerably hotter or considerably colder, and again rated in a temperature nearly equal to that specified. The rates did not
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A73    Periodical contribution:     FitzRoy, R. 1836. Sketch of the Surveying Voyages of his Majesty's Ships Adventure and Beagle, 1825-1836. Commanded by Captains P. P. King, P. Stokes, and R. Fitz-Roy, Royal Navy. Journal of the Geological Society of London 6: 311-343. (Communicated by John Barrow)   Text   Image   PDF
found chronometers go better than when the boxes were bedded in sawdust, and the watches moving freely in well-oiled jimbals. Suspending them in cots not only alters their rate, but makes them go less regularly. When fixed to a solid substance, they feel the vibrations caused by people running on the decks, by shocks, or by chain-cables running out. [page] 34
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A73    Periodical contribution:     FitzRoy, R. 1836. Sketch of the Surveying Voyages of his Majesty's Ships Adventure and Beagle, 1825-1836. Commanded by Captains P. P. King, P. Stokes, and R. Fitz-Roy, Royal Navy. Journal of the Geological Society of London 6: 311-343. (Communicated by John Barrow)   Text   Image   PDF
Remarks on the Beagle's Chronometric Measurements. Before attaching and value to the results shown in the accompanying paper, many questions will probably be asked. Some of those questions I will endeavour to anticipate by the following short detail. The chronometers, twenty-two in number,* were taken on board a month before the Beagle finally sailed from Plymouth. Their boxes were placed in sawdust, divided and retained by partitions secured upon two wide shelves. All were in one small cabin
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F10.2    Book:     FitzRoy, R. 1839. Narrative of the surveying voyages of His Majesty's Ships Adventure and Beagle between the years 1826 and 1836, describing their examination of the southern shores of South America, and the Beagle's circumnavigation of the globe. Proceedings of the second expedition, 1831-36, under the command of Captain Robert Fitz-Roy, R.N. London: Henry Colburn.   Text   Image   PDF
CHAPTER XIV. Paz and Liebre begin work Chronometers Fish Animals San Blas Wrecks River Negro Del Carmen Inhabitants Indians Trade Williams drowned Port Desire Gale Salinas Lightning Bones in Tomb Trees Dangers New Bay Cattle Seals Soil River Chupat Drift Timber Fertility Wild Cattle Valdes Creek Imminent danger Tide Races Bar of the Negro Hunting Attack of Indians Villarino Falkner. THE Paz and Liebre parted company with the Beagle on the 18th of October 1832, and commenced their undertaking
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F10.2a    Book:     [FitzRoy, R.] 1839. Narrative of the surveying voyages of His Majesty's Ships Adventure and Beagle between the years 1826 and 1836, describing their examination of the southern shores of South America, and the Beagle's circumnavigation of the globe. Appendix to Volume II. London: Henry Colburn.   Text   Image   PDF
Indifferent. V Do. 1 Pennington 426 Ld. Ashburnham Rather good. W Box 2 Molyneux 971 Government Good. X Do. 1 Earnshaw 509 Do. Rather good. Y Pocket 1 Morrice 6144 Do. Do. Z Box 8 French 4214 Do. Good. These chronometers being embarked, and permanently fixed, more than a month previous to the Beagle's departure from England, sufficient time elapsed to ascertain their rates satisfactorily. Suspended in gimbals, as usual, within a wooden box, each was placed in sawdust, divided and retained by
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F10.2a    Book:     [FitzRoy, R.] 1839. Narrative of the surveying voyages of His Majesty's Ships Adventure and Beagle between the years 1826 and 1836, describing their examination of the southern shores of South America, and the Beagle's circumnavigation of the globe. Appendix to Volume II. London: Henry Colburn.   Text   Image   PDF
rose rather above the centre of gravity of the box and watch; so that they could not be displaced unless the ship were upset. The shelves, on which the sawdust and boxes were thus secured, were between decks, low down, and as near the vessel's centre of motion as could be contrived. Placed in this manner, neither the running of men upon deck, nor firing guns,* nor the running out of chain-cables, caused the slightest vibration in the chronometers, as I often proved by scattering powder upon
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