22 Sep 2010 19:29
e who g
Perceptibly less sharp. It was this
accuracy of convergence of the light which led Dr. Draper to prefer
the mirror to the achromatic
lens. He has taken almost all the daily phases of the moon, f
accuracy of convergence of the light which led Dr. Draper to prefer
the mirror to the achromatic
lens. He has taken almost all the daily phases of the moon, f
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