 | John Timbs - 1859 - 312 sivua
...information respecting this new instrument is from an official paper published by the Board of Trade : Aneroid barometers, if often compared with good mercurial...instrument is a great boon ; for it can be placed any where, quite out of harm's way, and is not affected by the ship's motion, although faithfully giving... | |
 | Great Britain. Board of Trade - 1859 - 48 sivua
...valuable ; but it must be remembered that they are not independent instruments ; * Herschel. -)- Dove. that they are set originally by a barometer,* require...indication of increased or diminished pressure of air.j In ascending or descending elevations, the hand of the aneroid may be seen to move (like the... | |
 | British Association for the Advancement of Science - 1859 - 750 sivua
...barometer; required adjustment occasionally ; and might deteriorate in time, though slowly. The aneroid was quick in showing the variation of atmospheric pressure, and to the navigator (who knew at times the difficulty of using barometers) this instrument was a great boon, for it could be... | |
 | John Timbs - 1868 - 434 sivua
...showing the variation of atmospheric pressure ; and to the navigators who know at times the difficulty of using barometers, this instrument is a great boon...indication of increased or diminished pressure of air. It may be suspended on or near the upper deck, for easy reference ; and is not easily to be injured... | |
 | John Timbs - 1868 - 448 sivua
...navigators who know at times the difficulty of using barometers, this instrument is a great boon j for it can be placed anywhere, quite out of harm's...indication of increased or diminished pressure of air. It may be suspended on or near the upper deck, for easy reference ; and is not easily to be injured... | |
 | John Timbs - 1868 - 448 sivua
...but, as it often varies several hundredths with such a change, it should therefore be held uniformly. The Aneroid is quick in showing the variation of atmospheric pressure ; and to the navigators who know at times the difficulty of using barometers, this instrument is a great boon ;... | |
 | Thornton Alexander Jenkins - 1869 - 78 sivua
...They may also deteriorate in time, though slowly. 40. The aneroid barometer is quick in indicating the variation of atmospheric pressure, and to the navigator, who knows the difficulty in using mercurial barometers at times, this instrument is a great boon, for it is steady under all... | |
 | Nathaniel Bowditch - 1888 - 704 sivua
...set. They may also deteriorate in time, though slowly. The aneroid barometer is quick in indicating the variation of atmospheric pressure, and to the navigator, who knows the difficulty in using mercurial barometers at times, this instrument is a great boon, for it is steady under all... | |
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... deteriorate in time, though slowly." " The aneroid is quick in showing the variation of atmospheric pressure ; and to the navigator who knows the difficulty, at times, of using barometers, this instrument is a great boon, for it can be placed anywhere,... 