Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 261
se two instrumentscan be used. The difference in all probability depends on tingreater normal diameter of the pupils of the eyes of some observersin comparison with that of others. Dr. Lionel Beale devised one of the simplest cameras, whichhas the advantage of being thoroughly efficient. It… … Fig. 180.—Simplecamera. CAMERjE lucid a-: 235 pencil being seen through the glass. In its simplest form it is seenin fig. 181. The glass is tinted to lender the second reflexion fromthe internal surface of the glass inoperative. The reflexion of theimage is identical with that of Soemmerings. Fig.…
Microscopy
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