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Eclipses, Past and Future: With General Hints for Observing the Heavens. E-book. Formato PDF
Samuel Jenkins Johnson
edizioni Forgotten Books collana , 2017
It was originally my intention to bring out two works; one, a description of eclipses, past and future; the other, a cycle of celestial objects coming within the range of a 4-inch telescope, such an instrument being common with amateurs, and a very useful size, large enough to shew what is worth examining, and not...