Natural philosophy. being a hand-book of chemical physics, or, The physics of heat, light and electricity (1869)
Sangster, John Herbert, 1831-1904 · Montreal : J. Lovell · leaf 122
^<i 116 MAGNIFYING POWER OF LENSES. Note.—As the image a h and the object A B both subtend the sannangle, « c b, to the eye and the former is more remote, it is of course mag-nified. The enlarged image obtained by a single lens used as a microscopeis of the kind here described. 281. A concave…
Physics
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