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Astronomy without mathematics (1869)

Grimthorpe, Edmund Beckett, Baron, 1816-1905 · New York : G.P. Putnam · leaf 307

An illustration from Astronomy without mathematics, 1869, leaf 307
ys that came from A diverge a little from/to a, and the B rays to b, and there both pencils are refracted and made to converge into the eye at E, making a much wider angle dEb with each other than they did coming from the object: which is the increase of apparent size or magnification. Besides…

Astronomy

Internet Archive · Cornell University Library · Public domain (published before 1931). Free to use for anything.

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