Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 83
Fig. 80.—Comparative compression of.light rays in two different media. 58 VISION WITH THE COMPOUND MICEOSCOPE occupy the whole hemisphere (fig. 40) are in oil compressed withinan angle of 82° round the direct beam (fig. 41), so that there is roomfor additional beams. The unequal equivalent of equal…
Microscopy
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