| Royal Astronomical Society - 1871 - 718 pages
...words: — " With the slit of his spectroscope placed longitudinally at the moment of obscuration, and for one or two seconds later, the field of the...lines showing them, that is, bright on a dark ground." Rapid and imperfect as this early sketch must necessarily be of the observations of the last eclipse,... | |
| 1871 - 296 pages
...envelope surrounding the photosphere, and beneath the chromosphere, usually so called, whose tliickness must be limited to two or three seconds of arc, and...lines showing them, that is, bright on a dark ground." Rapid and imperfect as this early sketch must necessarily be of the observations of the last eclipse,... | |
| Heinrich Schellen - 1872 - 744 pages
...words: — " ' With the slit of his spectroscope placed longitudinally at the moment of obscuration, and for one or two seconds later, the field of the...Fraunhofer lines showing them, — that is, bright on a darkground.' " Rapid and imperfect as this early sketch must necessarily be of the observations of... | |
| 1872 - 318 pages
...interesting observation confirmed by Mr. Pye, a young gentleman whose voluntary aid proved of mueh service. From the concurrence of these independent...lines showing them, that is, bright on a dark ground." Professor Young adds : — " Seeche's continuous spectrum at the sun's limb is probably the same thing... | |
| 1872 - 342 pages
...to be justified in assuming the probable existence of an envelope surrounding the photosphere, aud beneath the chromosphere, usually so called, whose...lines showing them, that is, bright on a dark ground." Kapid and imperfect as this early sketch must necessarily be of the observations of the last eclipse,... | |
| Richard Anthony Proctor - 1872 - 396 pages
...the chromosphere usually so called, whose thickness must be limited to two or three seconds of are, and which gives a discontinuous spectrum consisting of all or nearly all the ordinary lines, showing them, that is to say, bright on a dark field.' In a note at p. 295 of my treatise... | |
| 1873 - 336 pages
...and for one or two seconds later, the field of the instrument was filled with bright lines. As far ai could be judged during this brief interval, every...lines showing them, that is, bright on a dark ground.' "Professor Young adds :— " ' Secchi's continuous spectrum at the sun's limb is probably the same... | |
| Elkanah Billings, Bernard James Harrington, James Thomas Donald - 1875 - 498 pages
...thickness must be limited to " two or three seconds of arc, (from nine to fourteen hundred " miles), and which gives a discontinuous spectrum consisting of " all, or nearly all, the Fraiinhofer lines, showing them, that is, '• Iright on a dark ground." Upon the trustworthiness of... | |
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