...These troughs, whichcan be obtained of the optician, should be of plateglass, about three inches long, nearly the same height,and about half an inch wide... 
Henry J. Slack 「Marvels of Pond-life」
...Its double, or ratherbinary, nature, was discovered in 1862 by the celebrated optician AlvanG...
Cecil G. Dolmage 「Astronomy of To-day」
...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 glass is then ready for the optician...
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」
...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」
...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」
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