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"Achromatic" Quotes from Famous Books
 ... all the Virtues! We can spare you now. A little clear perfection, undiluted with human weakness, goes a great way. Go! be useful, be honorable and honored, be just, be charitable, talk pure reason, and help to disenchant the world by the light of an achromatic understanding. Goodbye! Where is my Beranger? I must read a verse ...
— The Autocrat of the Breakfast-Table • Oliver Wendell Holmes, Sr. (The Physician and Poet not the Jurist)
... Jumna at Suez, and began the process of frizzling down the Red Sea, I noted on deck almost at once an odd-looking young man of twenty-two or thereabouts, with a curious faint pea-green complexion. He was the wishy-washiest young man I ever beheld in my life; an achromatic study: in spite of the delicate pea-greeniness of his skin, all the colouring matter of the body seemed somehow to have faded out of him. Perhaps he had been bleached. As he leant over the taffrail, gazing down with open mouth and vacant stare ...
— Miss Cayley's Adventures • Grant Allen
... The achromatic object-glass, invented by Dollond, about 1750, obviates this difficulty, and brings all the rays to nearly the same focus. Nearly every one interested in the subject is aware that this object-glass is composed of two lenses—a concave one of flint-glass and a convex one of crown-glass, the latter ...
— Side-lights on Astronomy and Kindred Fields of Popular Science • Simon Newcomb
... mirrors, a movement of the sensitive plate of only one-hundredth of an inch will render the image perceptibly less sharp. It was this accuracy of convergence of the light which led Dr. Draper to prefer the mirror to the achromatic lens. He has taken almost all the daily phases of the moon, from the sixth to the twenty-seventh day, using mostly some of Mr. Anthony's quick collodion, and has repeatedly obtained the full moon by means of it in one-third of ...
— Atlantic Monthly, Vol. XII. July, 1863, No. LXIX. - A Magazine Of Literature, Art, And Politics • Various
... 1821, the younger Herschel, in conjunction with Sir James South, undertook a series of observations on the distances and positions of three hundred and eighty double and triple stars, by means of two splendid achromatic telescopes of five and seven focal length. These were continued during 1822 and 1823, and have proved ...
— The Story of the Herschels • Anonymous
... sweetly the plain-song was dissolved into descant, and how easily they came off with the last rest. Hark, hark, the bitter'st[268] sweetest achromatic. ...
— A Select Collection of Old English Plays, Vol. IX • Various
... with such a combination of lenses, that they may be used double or single, is frequently necessary for the examination of blowpipe experiments, or the reaction of the fluxes. Common lenses, howsoever cheap they may be, are certainly not recommended. A microscope with achromatic lenses can now be purchased so cheap that there is no longer any necessity of procuring one with the common lens. Besides, there is no reliability whatever to be placed in the revelations of the common lens; while on the contrary, ...
— A System of Instruction in the Practical Use of the Blowpipe • Anonymous
... ACHROMATIC. An optical term applied to those telescopes in which aberration of the rays of light, and the colours dependent thereon, are partially ...
— The Sailor's Word-Book • William Henry Smyth
... chromatic aberration, remained insurmountable until John Dollond (born 1706, died 1761), after many experiments, found out how to make an achromatic lens out of two lenses—one of crown glass, the other of flint glass—to destroy the colour, in a way originally suggested by Euler. He soon acquired a great reputation for his telescopes of moderate size; but there was a difficulty in making flint-glass lenses of large size. The first actual ...
— History of Astronomy • George Forbes |
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