...But the price which the optician demandedseemed more than Herschel thought he could or ought to give...
Robert Stawell Ball 「The Story of the Heavens」
...The former defect is noteasily detected or remedied; nor is it commonly met with in the work ofa careful optician...
Richard A. Proctor 「Half-hours with the Telescope」
...The very best optician will alwaysfind that on a first trial his glass is not perfect...
Simon Newcomb 「Side-lights on Astronomy and Kindred Fields of Popular Science」
...It may be remarked that this lastadjustment is the proper work of the optician, since it is so difficultthat the user of the telescope cannot ordinarily effect it...
Simon Newcomb 「Side-lights on Astronomy and Kindred Fields of Popular Science」
...The test applied by the optician is much more exact, and also moreeasy...
Simon Newcomb 「Side-lights on Astronomy and Kindred Fields of Popular Science」
...Our first object is to see ifthe optician has given us a good glass...
Garrett Serviss 「Pleasures of the telescope」
...Its double, or ratherbinary, nature, was discovered in 1862 by the celebrated optician AlvanG...
Cecil G. Dolmage 「Astronomy of To-day」
...That the spectra of the moon and planets are practically nothing butfaint reproductions of the spectrum of the sun was discovered by thegreat German optician Fraunhofer about the year 1816...
Robert Stawell Ball 「The Story of the Heavens」
...The tool of the optician is a very simple affair,being nothing more than a plate of iron somewhat larger, perhaps afourth, than the lens to be ground to the corresponding curvature...
Simon Newcomb 「Side-lights on Astronomy and Kindred Fields of Popular Science」
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