Jones, H. Spencer (Harold Spencer), 1890- · London E. Arnold & co. · leaf 154
verygreat heights. For some time after the discovery of promin-ences, it was thought that it was only possible to observe themat the time of eclipse. At other times the glare produced bythe scattering of sunlight by the Earths atmosphere rendersthem invisible. In 1868, Lockyer and Janssen… … S.P. n,!.,„,/r,S. (a) SlIX, FHOTOCKAPHED IN Ki LIGHT. iqiO AlRIL II.
Astronomy
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