His frame was slight, his hair silvered, his smile fatherly.
Despite his urgency, Mr. Tim was immaculately dressed, his silvered hair clashing with features rendered youthful by multiple advanced cosmetic surgeries.
A man in his prime with silvered hair emerged from the darkness.
A faint light being thrown on the outside of the silvered plate, there appear bright lines in the field of view.
Apart, and another similar system of lines at right angles to the first, thus dividing the silvered surface of the plate into squares 5 mm.
The cutter employed to rule these lines removes the silver in fine lines from the surface of the glass, Thus, if a photographic plate, before it is exposed in the telescope, is placed with its sensitive surface nearly in contact with the silvered surface of this reseau, and if parallel light, normal to the surface of the plate, is allowed to fall on the silvered film through the glass on which the film has been deposited, that light will pass through the fine lines in the silver film where the silver has been removed by the cutter, but will otherwise be intercepted by the silver film.
But if the cemented face of P4 is silvered, From Zeitschr.
The narrow tongues of the silvered surface will now reflect corresponding parts of the star-spectrograph, and will obliterate corresponding parts of the solar spectrograph - as shown in figs.
To the north of Venice, was a great source of revenue to the republic. Glass drinking cups and ornamental vessels, some decorated with enamel painting, and "silvered" mirrors were produced in great quantities from the 14th century downwards, and exported.
A part of one surface of the plate may be silvered, so that the polarized ray, after having once traversed the glass, is reflected back again; the rotation is thus doubled, and moreover, the arrangement is, for certain experiments, more convenient than the other.
The kaleidophone, intended to present visibly the movements of a sonorous body, consisted of a vibrating wire or rod carrying a silvered bead reflecting a point of light, the motions of which, by persistence of the successive images on the retina, were thus represented in curves of light.
The rays, rendered parallel by the collimator objective, meet a plane mirror (f) of silvered glass, which reflects them to the prisms (g, g').
Silvered mirrors have also some advantage in light grasp over those of speculum metal, though, aperture for aperture, the former are inferior to the modern object-glass.
Comparisons of light grasp derived from small, fresh, carefully silvered surfaces are sometimes given which lead to illusory results, and from such experiments Foucault claimed superiority for the silvered speculum over the object-glass.
But Sir David Gill found from experience and careful comparison that a silvered mirror of 12-in.
Aperture, mounted as a Newtonian telescope (with a silvered plane for the small mirror), when the surfaces are in fair average condition, is equal in light grasp to a first-rate refractor of 10-in.
By making the mirrors of silvered glass, one-fourth of their diameter in thickness, the Henrys have not only `.
Instrument of the same type subsequently mounted at Paris, and in like instruments of intermediate size mounted at other French observatories, the object-glass is placed outside the mirror N, so that both the silvered mirrors are protected from exposure to the outer air.
If the vacuum jacket is silvered inside, radiation also is reduced to such an extent that, if the vacuum is really good, the external ice bath may be dispensed with for the majority of purposes.
It may be obtained electrolytically from solutions of ferrous and magnesium sulphates and sodium bicarbonate, a wrought iron anode and a rotating cathode of copper, thinly silvered and iodized, being employed (S.
The cover glasses are silvered on their under surfaces, and in the silvering fine lines are drawn; these lines form the test object.
A little hole in the silvered plate a marks the centre of this circle.
The general colour is deep liver-brown, silvered or frosted with the hoary tips of the longer stiff hairs.