A Popular History of Astronomy During the Nineteenth Century Fourth Edition
CHAPTER III
PROGRESS OF KNOWLEDGE REGARDING THE SUN
Early Views as to the Nature of Sun-spots--Wilson's Observations and Reasonings--Sir William Herschel's Theory of the Solar Constitution--Sir John Herschel's Trade-Wind Hypothesis--Baily's Beads--Total Solar Eclipse of 1842--Corona and Prominences--Eclipse of 1851 52