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The first fixed lens to be constructed with toroidal prisms was a first-order apparatus designed by the Scottish engineer Alan Stevenson under the guidance of Léonor Fresnel, and fabricated by Isaac Cookson & Co. using French glass; it entered service at the Isle of May, Scotland, on 22 September 1836.
Prism graphs are examples of generalized Petersen graphs, with parameters GP ( n ,1). They may also be constructed as the Cartesian product of a cycle graph with a single edge. [1] As with many vertex-transitive graphs, the prism graphs may also be constructed as Cayley graphs. The order- n dihedral group is the group of symmetries of a regular ...
The Maddox rod test can be used to subjectively detect and measure a latent, manifest, horizontal or vertical strabismus for near and distance. The test is based on the principle of diplopic projection. [1] Dissociation of the deviation is brought about by presenting a red line image to one eye and a white light to the other, while prisms are ...
Google Glass, or simply Glass, is a brand of smart glasses developed and sold by Google. It was developed by X (previously Google X), [9] with the mission of producing a ubiquitous computer . [1] Google Glass displays information to the wearer using a head-up display . [10]
The original Northwood Glass Company was established by Harry Northwood in 1887 in Martins Ferry, Ohio. However, the company was later relocated to Ellwood City, Pennsylvania, where it failed to thrive. [3] In 1895 he opened up the New Northwood glass company in a factory previously owned by the Indiana Glass company in Indiana, Pennsylvania.
British Museum. [3] The Rassam cylinder is a cuneiform cylinder, forming a prism with ten faces, written by Neo-Assyrian king Ashurbanipal in 643 BCE. The 7th century BCE cylinder was discovered in the North Palace of Nineveh by Hormuzd Rassam in 1854, hence its name. It is located in the British Museum.