Jones, H. Spencer (Harold Spencer), 1890- · London E. Arnold & co. · leaf 154
S.P. n,!.,„,/r,S. (a) SlIX, FHOTOCKAPHED IN Ki LIGHT. iqiO AlRIL II. … S.P. /v./,,;,,Mm. (b) Sun, imiotocraIIied l\ U lihili. igio AiKil ii. THE SUN 131 weak intensity which does not obscure the spectrum of theprominences, since the latter consists only of a few bright lines.If the outsldrts of the limb are searched with the spectroscope,a prominence will be detected…
Astronomy
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