Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 140
he cardi-nal points of the combina-tion. The method of proce-dure is as follows : If x isthe given point, its dis-tance from f, the focus oflens No. 1, must first bemeasured. Call this dis-tance x. Then the distanceof o its conjugate from theother focus, f\ supposinglens No. 2 to be removed,can be… … i 2 Il6 VISION WITH THE COMPOUND MICROSCOPE Before proceeding it will be as well to examine other possiblecases which might occur. Suppose that x was at the point / then x would equal 0, amio = oo ; that is, o would lie at an infinite distance from / . If, onthe other hand, the point x was to the…
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