Cosmos a Sketch of a Physical Description of the Universe volume 1
Cosmos a Sketch of a Physical Description of the Universe volume 1
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In our eReader you can find the full English version of the book. Read Cosmos a Sketch of a Physical Description of the Universe volume 1 Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Cosmos a Sketch of a Physical Description of the Universe volume 1
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The knowledge which we at present possess of the altitude of the polar light is based on measurements which, from their nature, the constant oscillation of the phenomenon of light, and the consequent uncertainty of the angle of parallax, are not deserving of much confidence. The results obtained, set- ting aside the older data, fluctuate between several miles and an elevation of 3000 or 4000 feet ; and, in all probability, the northern lights at different times occur at very different elevation...s. * The most recent observers are disposed to place the phenomenon in the region of clouds, and not on the con- fines of the atmosphere ; and they even believe that the rays of the Aurora may be affected by winds and currents of air, if the phenomenon of light, by which alone the existence of an electro-magnetic current is appreciable, be actually connected with material groups of vesicles of vapor in motion, or, more correctly speaking, if light penetrate them, passing from one vesicle to another.
What to read after Cosmos a Sketch of a Physical Description of the Universe volume 1?
You can find similar books in the "Read Also" column, or choose other free books by Humboldt, Alexander Von, 1769-1859 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The knowledge which we at present possess of the altitude of the polar light is based on measurements which, from their nature, the constant oscillation of the phenomenon of light, and the consequent uncertainty of the angle of parallax, are not deserving of much confidence. The results obtained, set- ting aside the older data, fluctuate between several miles and an elevation of 3000 or 4000 feet ; and, in all probability, the northern lights at different times occur at very different elevation...s. * The most recent observers are disposed to place the phenomenon in the region of clouds, and not on the con- fines of the atmosphere ; and they even believe that the rays of the Aurora may be affected by winds and currents of air, if the phenomenon of light, by which alone the existence of an electro-magnetic current is appreciable, be actually connected with material groups of vesicles of vapor in motion, or, more correctly speaking, if light penetrate them, passing from one vesicle to another.
What to read after Cosmos a Sketch of a Physical Description of the Universe volume 1?
You can find similar books in the "Read Also" column, or choose other free books by Humboldt, Alexander Von, 1769-1859 to read onlineMoreLess
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