 | 1869 - 508 pages
...barium when observed in a spot, are thicker than their usual Fraunhofer lines. (2.) The same lines when observed in the chromosphere are thinner than their usual Fraunhofer lines. The author considers these facts additional proof of the truth of his assertion made in 1 865, on telescopic... | |
 | Royal Society (Great Britain) - 1869 - 674 pages
...of sodium, magnesium, and barium, when observed in a spot, are thicker than their usual Frauuhofer lines. II. The lines of sodium, magnesium, and barium,...in the chromosphere, are thinner than their usual Frauuhofer lines. A series of experiments bearing upon these observations is now in progress at the... | |
 | 1869 - 340 pages
...sodium, magnesium, and barium, when observed in a spot, are thicker than their usual Fraunhofer lines. 2. The lines of sodium, magnesium, and barium, when observed...chromosphere, are thinner than their usual Fraunhofer lines. These facts give additional evidence that a spot is the seat of a downrush — a downrush to a region,... | |
 | Royal Society (Great Britain) - 1869 - 658 pages
...height of the chromosphere ; but the hydrogen lines towered high above those due to the newly injected materials. The lines of magnesium extended perhaps...communication from Dr. Frankland and myself. I may at once, however, remark that we have here additional evidence of a fact I asserted in 1 865 on telescopic evidence... | |
 | 1869 - 342 pages
...sodium least of all. We have, then, the following facts : — I. The lines of sodium, magnesium, aud barium, when observed in a spot, are thicker than...communication from Dr. Frankland and myself. I may at once, however, remark that we have here additional evidence of a fact I asserted in 1865 on telescopic evidence... | |
 | Royal Society (Great Britain) - 1869 - 658 pages
...of sodium, magnesium, and barium, when observed in a spot, are thicker than their usual Frauuhofer lines. II. The lines of sodium, magnesium, and barium,...communication from Dr. Frankland and myself. I may at ouce, however, remark that we have here additional evidence of a fact I asserted iu 1865 on telescopic... | |
 | Henry Enfield Roscoe - 1870 - 514 pages
...magnesium, and barium, when observed in a spot, are thicker than their usual Fraunhofer lines. " 2. The lines of sodium, magnesium, and barium, when observed...chromosphere, are thinner than their usual Fraunhofer lines. " For some time past I have been engaged in endeavouring to obtain a sight of the prominences, by using... | |
 | 1869 - 668 pages
...sodium, magnesium, and barium, when observed in a spot, are thicker than their usual Fraunhofer lines. 2. The lines of sodium, magnesium, and barium, when observed...chromosphere, are thinner than their usual Fraunhofer lines. These fads give additional evidence that a spot is the seat of a downrush— a downrush to a region,... | |
 | Royal Institution of Great Britain - 1869 - 636 pages
...these lines is due to selective absorption. We have, then, the following facts : mark them well — 1. The lines of sodium, magnesium, and barium, when observed in the chromosphere, are among those which are thinner than their usual Fraunhofer lines. 2. The lines of sodium, magnesium,... | |
 | sir Henry Enfield Roscoe - 1870 - 452 pages
...magnesium, and barium, when observed in a spot, are thicker than their usual Frauuhofer lines. " 2. The lines of sodium, magnesium, and barium, when observed...chromosphere, are thinner than their usual Fraunhofer lines. " For some time past I have been engaged in endeavouring to obtain a sight of the prominences, by using... | |
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... materials. The lines of magnesium extended perhaps one-sixth of the height of the F line, barium a little less, and sodium least of all. We have, then, the following facts : — I. 
