The young astronomer; or, The facts developed by modern astronomy, collected for the use of schools and the general reader (1847)
Abbott, John S. C. (John Stevens Cabot), 1805-1877 · New York, J.C. Riker [etc.] · leaf 99
about two clays anda half. It is very difficult to come to any satisfactoryconclusion respecting the cause of this phenomenon.Various theories, however, have been proposed to ac-count for these appearances. FIRST THEORY. Sir William Herschel suggests that one hemisphereof these globes may be…
Astronomy
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