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File:Reports of explorations and surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean (1855) (14574196430).jpg

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Identifier: reportsofexplora03unit_0 (find matches)
Title: Reports of explorations and surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean
Year: 1855 (1850s)
Authors: United States. War Dept Henry, Joseph, 1797-1878 Baird, Spencer Fullerton, 1823-1887 United States. Army. Corps of Engineers
Subjects: Pacific railroads Discoveries in geography Natural history Indians of North America
Publisher: Washington : A.O.P. Nicholson, printer (etc.)
Contributing Library: San Francisco Public Library
Digitizing Sponsor: California State Library Califa/LSTA Grant

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the idea of making a diagram of the observations was suggested. Those c From observations made, for ten days together, by F. Laval, upon the top of St. Pilen, a mountain near Marseilles,which is 900 yards high, (see Russells lectures, previously alluded to,) John Dalton remarks that it may he inferred thatthe fluctuations of the barometer are occasioned chiefly by a variation in the density of the lower regions of the air, and notby an alternate elevation and depression of the whole superincumbent atmosphere. This theory, if true, would diminishthe value of the barometer as an instrument for determining altitudes. However, the barometric waves in the elevated,regions of the Rocky mountains are not appreciably less than at Fort Gibson, with a difference in altitude of 5,000 feet.Hence, while the observations arc confined to the stratum Sear the general surface of the earth, it seems to be evident thatthe amount of the barometric oscillations is independent of the height above the sea.
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United States. War Dept; Henry, Joseph, 1797-1878; Baird, Spencer Fullerton, 1823-1887;

United States. Army. Corps of Engineers
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27 July 2014
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current22:00, 20 February 2022Thumbnail for version as of 22:00, 20 February 20223,296 × 2,369 (562 KB)SteinsplitterBot (talk | contribs)Bot: Image rotated by 90°
22:20, 16 October 2015Thumbnail for version as of 22:20, 16 October 20152,369 × 3,299 (566 KB)Fæ (talk | contribs)== {{int:filedesc}} == {{information |description={{en|1=<br> '''Identifier''': reportsofexplora03unit_0 ([https://commons.wikimedia.org/w/index.php?title=Special%3ASearch&profile=default&fulltext=Search&search=insource%3A%2Freportsofexplora03unit_0%2F...

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