Brocklesby, John, 1811-1889. [from old catalog] · New York, Sheldon and company · leaf 145
y revolutions has a spot been known to make ?What is said respecting the proper motion of the solar spots ? Which of the twoproper motions is most marked? PACUL^l—PORES, GRANULES, &C. 133 tions in longitude and latitude give to the spots a ro-tary motion, which has been distinctly observed,… … MJMINOUS FRINGES AND MOTTLED SURFACE OF THE SUN, WITH THE DARK ous portions of the suns surface, are found in the vi-cinity of large spots and groups ; and extend over im-mense tracts, some of the faculae being 40,000 mileslong and from 1,000 to 4,000 miles broad. They areseen to the best advantage…
Astronomy
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