The mirrors of the Greeks are among the most important specimens of their artistic metal-work.
The mirrors on the landing reflected ladies in white, pale-blue, and pink dresses, with diamonds and pearls on their bare necks and arms.
If you use the right colors, and brighten the walls with a few large pictures, or some mirrors, it wouldn't be so dark.
By noon she had the pictures and mirrors on the walls and was hanging the curtains when Cade came in.
Still another door led her to a locker room with mirrors along two walls and another door to the restrooms.
"This way," the fed said, starting down a corridor lined with gilded mirrors and marble statues.
12039 of 1896) brought forward the idea of focusing a beam of electric radiation for telegraphic purposes on a distant station by means of parabolic mirrors, and tried this method successfully on Salisbury Plain up to a distance of about a couple of miles.
As, however, the wavelength necessary to cover any considerable distance must be at least 200 or 300 ft., it becomes impracticable to employ mirrors for reflection.
In length by any mirrors which can be practically constructed would be like attempting optical experiments with mirrors one-hundred-thousandth of an inch in diameter.
The article REFLECTION explains the symmetrical arrangement of images formed by two mirrors inclined at an angle which is a sub-multiple of four right angles.
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.
Special progress has been made in the production of mirrors, electric lamps, candelabra and mosaics.
Bacon then discusses vision in a right line, the laws of reflection and refraction, and the construction of mirrors and lenses.
From the Arabic); the use of powder and of glass mirrors, and also of the rosary itself - all these things came to Europe from the East and as a result of the Crusades.
For such purposes, as also for use as mirrors, masks and labrets, it was extensively employed, under the name, of itztli, by the ancient Mexicans, who quarried it at the Cerro de las Navajas, or "Hill of Knives," near Timapan.
From the large masses great lenses and mirrors may be produced, while the smaller pieces are used for the production of the disks and slabs of moderate size, in which the optical glass of commerce is usually supplied.
Attempts to make mirrors of glass were made as early as A.D.
1317, but even in the 16th century mirrors of steel were still in use.
During the 16th and 17th centuries Venice exported a prodigious quantity of mirrors, but France and England gradually acquired knowledge and skill in the art, and in 1772 only one glass-house at Murano continued to make mirrors.
He also made with great taste and skill large lustres and mirrors with frames of glass ornamented either in intaglio or with foliage of various colours.
During the protectorate all patent rights virtually lapsed, and mirrors and drinking-glasses were once more imported from Venice.
In 1663 the duke of Buckingham, although unable to obtain a renewal of the monopoly of glass-making, secured the prohibition of the importation of glass for mirrors, coach plates, spectacles, tubes and lenses, and contributed to the revival of the glass industry in all its branches.
The chronicle of the Sinhalese kings, the Mahavamsa, however, asserts that mirrors of glittering glass were carried in procession in 306 B.C., and beads like gems, and windows with ornaments like jewels, are also mentioned at about the same date.
Gratian's Decretum mirrors two tendencies, the church legislation with its growingly less extended application, and the wide meaning as in Justinian's Code, owing to the revival of Roman law in the 11th century.
Dumas, who regarded them as hydrates of olefiant gas (ethylene); on the other they yielded chloroform, chloral and aldehyde, as well as other compounds of less general interest, and also the method of forming mirrors by depositing silver from a slightly ammoniacal solution by acet aldehyde.
He also had some knowledge of the properties of concave and convex lenses and mirrors in forming images.
His arrangement of concave and plane mirrors, by which the realistic images of objects inside the house or in the street could be rendered visible though intangible, there alluded to, may apply to a camera on Cardan's principle or to a method of aerial projection by means of concave mirrors, which Bacon was quite familiar with, and indeed was known long before his time.
On the strength of similar arrangements of lenses and mirrors the invention of the camera obscura has also been claimed for Leonard Digges, the author of Pantometria (1571), who is said to have constructed a telescope from information given in a book of Bacon's experiments.
Tin amalgam is used for "silvering" mirrors, gold and silver amalgam in gilding and silvering, cadmium and copper amalgam in dentistry, and an amalgam of zinc and tin for the rubbers of electrical machines; the zinc plates of electric batteries are amalgamated in order to reduce polarization.
Experiments may be made with plane and curved mirrors to verify these laws, but it is necessary to use short waves, in order to diminish diffraction effects.
For this purpose four vertical mirrors are arranged round the vertical sides of a cube which is rapidly revolved about a vertical axis.
He then describes the effects of magnification from a combination of lenses or mirrors, adding: - "But of these conclusions I minde not here to intreate, having at large in a volume 2 by itselfe opened the miraculous effects of perspective glasses."
James Gregory, in his Optica Promota (1663), discusses the forms of images and objects produced by lenses and mirrors, and shows that when the surfaces of the lenses or mirrors are portions of spheres the images are curves concave towards the objective, but if the curves of the surfaces are conic sections the spherical aberration is corrected.
A A and B B are concave mirrors having a common axis and their concavities facing each other.
The practical difficulty of constructing Gregorian telescopes of good defining quality is very considerable, because if spherical mirrors are employed their aberrations tend to increase each other, and it is extremely difficult to give a true elliptic figure to the necessarily deep concavity of the small speculum.
The magnifying power of the telescope is = Ff /ex, where F and f are respectively the focal lengths of the large and the small mirror, e the focal length of the eye-piece, and x the distance between the principal foci of the two mirrors (=Ff in the diagram) when the instrument is in adjustment for viewing distant objects.
One of Short's mirrors, made about 1760 or 1770, of 6-in.
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.
There must be a certain loss of light from two, additional reflections; but that could be tolerated for the sake of other advantages, provided that the mirrors could be made sufficiently perfect \ optical planes.
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.
3935); it consists in placing both the mirrors of Loewy's "equatorial coude" at the top of the polar axis instead of the lower end of it.