"Micrometer" Quotes from Famous Books
 ... parallel with itself a measured distance by means of the micrometer screw, the number of alternations of light and darkness is exactly twice the number of wave lengths in the measured distance. Thus the determination consists absolutely of a measurement of a length and the ...
— Scientific American Supplement, No. 633, February 18, 1888 • Various
... necessary, yet the price is lower in a yet greater degree, so that the amateur will find it better to buy than to make his eye-piece, unless he is anxious to test his mechanical powers. For a telescope which has no micrometer, the Huyghenian or negative eye-piece, as it is commonly called, is the best. As made by Huyghens, it consists of two plano-convex lenses, with their plane sides next the eye, as shown ...
— Side-lights on Astronomy and Kindred Fields of Popular Science • Simon Newcomb
... results as with an Amsler planimeter; he regards his instrument as equivalent to a foot rule in comparison with a micrometric gage as representing Amsler's instrument; but for a great number of purposes the foot rule is sufficiently accurate, and only when great accuracy is required will a micrometer be used, so with the two forms of planimeter. The rougher instrument has some advantages, however; there are no delicate moving parts to get out of order, and the ...
— Scientific American Supplement, No. 1082, September 26, 1896 • Various
... pair were carefully measured, and (with a few exceptions) the angles made with the hour-circle by the lines joining their centres (technically called "angles of position") were determined with the aid of a "revolving-wire micrometer," specially devised for the purpose. Moreover, an important novelty was introduced by the observation of the various colours visible in the star-couples, the singular and vivid contrasts of which were now ...
— A Popular History of Astronomy During the Nineteenth Century - Fourth Edition • Agnes M. (Agnes Mary) Clerke
... suppose are whirled along, like pebbles in a stream, with the blood which warms your frame and colors your cheeks?—A noted German physiologist spread out a minute drop of blood, under the microscope, in narrow streaks, and counted the globules, and then made a calculation. The counting by the micrometer took him a week.—You have, my full-grown friend, of these little couriers in crimson or scarlet livery, running on your vital errands day and night as long as you live, sixty-five billions, five hundred and seventy thousand millions. Errors excepted.—Did ...
— The Professor at the Breakfast Table • Oliver Wendell Holmes (Sr.)
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