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The Little Missouri was in her spring fullness, and the hills among which she found her way to the Great Muddy were profusely adorned with colors, much like those worn by the wild red man upon a holiday! Looking toward the sunrise, one saw mysterious, deep shadows and bright prominences, while on the opposite side there was really an extravagant array of variegated hues.
There were the prominences of the forehead, nose, and chin, dimly shown as under a veil there, the round outline of the chest and the hollow below it there, the points of the knees, and the stiff, ghastly, upturned feet. I looked again, yet more attentively.
Of the sun-spots it is not our intention here specifically to speak, but they evidently have an intimate connection with eruptive prominences, as well as some relation, not yet fully understood, with the corona.
Which nevertheless we cannot do in our dreams, because we have neither perceptions of external bodies, nor the power of volition to enable us to compare them with the ideas of imagination. III. Of Vision. Our eyes observe a difference of colour, or of shade, in the prominences and depressions of objects, and that those shades uniformly vary, when the sense of touch observes any variation.
According to this view, the star is to be regarded as possessing an extensive atmosphere of hydrogen, which, during the maximum, is upheaved into enormous prominences, and the brilliance of the light from these prominences suffices to swamp the photospheric light, so that in the spectrum the hydrogen lines appear bright instead of dark.
On October 20th Lockyer, having news of the eclipse, but not of Jansen's observations the day after, was able to see these lines. This was a splendid performance, for it enabled the prominences to be observed, not only during eclipses, but every day. Moreover, the next year Huggins was able, by using a wide slit, to see the whole of a prominence and note its shape.
Both these extensions we find most ably utilized in the recent discussion of the very interesting photographs of the spectra of the prominences and of the corona taken during the total eclipse of May 18, 1882; and the photographic results of this eclipse afford ample proof that we can not only obtain pictures of the corona by photography that it would be impossible otherwise to procure, but also that in a few seconds information concerning the nature of the solar atmosphere may be furnished by photography that it would otherwise take centuries to accumulate, even under the most favorable circumstances.
The great, blazing sun whose streamer prominences, even, were too bright to be looked at with the naked eye the sun neared and reached the horizon. There was no change in the star-studded sky. There were no sunset colorings. The incandescent brightness on the mountains was not lessened in the least. Only the direction of the stark black shadows shifted. The glaring sun descended.
They saw the magnificent spectacle of solar prominences shooting hundreds of thousands of miles into space, and directly in their path they saw an immense sunspot, a combined volcanic eruption and cyclonic storm in a gaseous-liquid medium of blinding incandescence. "Better dodge that spot, hadn't we, ace? Mightn't it be generating interfering fourth-order frequencies?" cried Seaton.
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