Abstract
IX. DID THESE SWARMS OR COMETS ALWAYS BELONG TO THE SYSTEM? MUST we assume that the members of the swarms to which we have referred and of all the other swarms similar to it have always been thus crossing the earth's orbit periodically; that the November swarm, to take an instance, has always been crossing it every thirty-three years? Must they of necessity have started their existence with the planets and other more stable members of the system? This point has been well inquired into, and it is certain that it is not at all necessary that such a state of things should have existed from all time.
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Continued from vol. xxxix. p. 402
Les Mondes, vol. xiii. p. 147.
Monthly Notices, vol. xxxix. p. 279.
Students of spectrum analysis will understand that this is a "short title," and does not represent the exact wave-length, which with adequate instruments might require something between 1.0 and 100 numerals.
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LOCKYER, J. Notes on Meteorites1. Nature 40, 136–139 (1889). https://doi.org/10.1038/040136a0
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DOI: https://doi.org/10.1038/040136a0