...He at once decided to have a betterinstrument, and he wrote to a celebrated optician in London with theview of making a purchase...
Robert Stawell Ball 「The Story of the Heavens」
...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」
...TheEarl of Morton and James Short, the optician,who observed the phenomenon at AberdourCastle, 10 miles N...
George Chambers 「The Story of Eclipses」
...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 first process to be performed by the optician is to grind the glassinto the shape of a lens with perfectly spherical surfaces...
Simon Newcomb 「Side-lights on Astronomy and Kindred Fields of Popular Science」
...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」
...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」
...Galileo must be regarded as the inventor of this kind oftelescope, which in one respect differed very materially from the oneconstructed by the Dutch optician...
Thomas Orchard 「The Astronomy of Milton's 'Paradise Lost'」
...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」
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