Astronomy for the use of schools and academies (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908, Rolfe, W. J. (William James), 1827-1910 · New York : Potter, Ainsworth, & Co. · leaf 220
he image of that portion of the solar limbwhich is to be examined shall be tangent to the opened slit,as in Fig. 216, which represents the slit-plate of the spectro-scope of its actual size, with the image of the sun in theproper position for observation. If, now, a prominence exists at this part… … 200 ASTRONOMY. stretch athwart the field of view like a scarlet ribbon with adarkish band across it; and in that band will appear the promi-nences, like scarlet clouds, so like our own terrestrial clouds,indeed, in form and texture, that the resemblance is quitestartling. One might almost think he…
Astronomy
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