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Cavalletto at the Inquisitor's Palace, in Birgu. A wooden horse, Chevalet (as it was called in Spain), Spanish donkey or cavalletto squarciapalle is a torture device, of which there exist two variations; both inflict pain by using the subject's own weight by keeping the legs open, tied with ropes from above, while lowering down the subject. [1]
A modern military compass, with included sight device for aligning. A compass is a device that shows the cardinal directions used for navigation and geographic orientation. It commonly consists of a magnetized needle or other element, such as a compass card or compass rose, which can pivot to align itself with magnetic north.
The unwanted interference effects are suppressed by vapour-depositing a special dielectric coating known as a phase-compensating coating on the roof surfaces of the roof prism. These phase-correction coating or P-coating on the roof surfaces was developed in 1988 by Adolf Weyrauch at Carl Zeiss [6] Other manufacturers followed soon, and since ...
A typical application of such a lens is to refocus the correction allowing clear vision at any distance. Unlike with bifocals, near-vision correction is achieved over the entire field of view, in any direction. Switching between distance and near vision is accomplished by re-adjusting the lens, instead of by tilting and/or rotating the head.
The two periscopes differ in the way they erect the image. The left one uses an erecting prism whereas the right uses an erecting lens and a second image plane. a Objective lens b Field lens c Image erecting lens d Ocular lens e Lens of the observer's eye f Right-angled prism g Image-erecting prism
Beatles for Sale is the fourth studio album by the English rock band the Beatles.It was released on 4 December 1964 in the United Kingdom on EMI's Parlophone label. The album marked a departure from the upbeat tone that had characterised the Beatles' previous work, partly due to the band's exhaustion after a series of tours that had established them as a worldwide phenomenon in 1964.
Example of a Kozyrev mirror. A Kozyrev mirror (Russian: Зеркало Козырева, romanized: Zerkalo Kozyreva), in Russian esoteric literature from the 1990s, is a pseudoscientific device made from long sheets of aluminum (sometimes from glass, or a reflecting, mirror-like material) curled into a cylindrical spiral.
The Prentice position. The Prentice position is an orientation of a prism, used in optics, optometry and ophthalmology. [1] In this position, named after the optician Charles F. Prentice, the prism is oriented such that light enters it at an angle of 90° to the first surface, so that the beam does not refract at that surface.
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