A high-school astronomy: in which the descriptive, physical, and practical are combined .. (1859)
Mattison, Hiram, 1811-1868 · New York, Mason brothers · leaf 146
302. The periods of but few comets are known. That of1818, called EncMs Co-met, has a period of only3J year^. Bields Comethas a t vfiod of 6f years.That <J .«.682 (then firstnotice with care, andiden - ^ed as the samethat had appeared in1456, 1531, and 1607)has a period of about 76years. It is… … 300. Velocity of comets ? Uniform or not ? Comet of 1472 ? Of 16S0 ? 301. Temperature? Comet of 1680 ? Supposed cause of their tails \ 302. Periods? Enckes ? Biela s ? Halleys? That of 1680? Supposedperiods of others ? Opinions of Prof. Nichol and Dr. Herschel ? 142 ASTRONOMY. 2250. Many are…
Astronomy
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