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An HMI lamp uses mercury vapour mixed with metal halides in a quartz-glass envelope, with two tungsten electrodes of medium arc separation. Unlike traditional lighting units using incandescent light bulbs , HMIs need electrical ballasts , which are separated from the head via a header cable, to limit current and supply the proper voltage.
Retreat, Hell! is a 1952 American war film about the 1st Marine Division in the Korean War, directed by Joseph H. Lewis.It stars Frank Lovejoy as a career Marine battalion commander who is recalled from work at an American embassy, Richard Carlson as a veteran captain and communications specialist of World War II called up from the Marine Corps Reserves, Russ Tamblyn as a seventeen-year-old ...
[Note 2] If a lamp has a "G" code, [Note 3] this will mean the lamp is a bipin shape and the number following the G will indicate the distance in millimeters between the pins, usually either 4, 6.35 or 10; if the G is followed by a letter "Y", then the lamp's pins are thicker than normal— thus, a G6.35 has pins that are 1 mm in diameter but a ...
Scholars have proposed many identifications for myths about luminous gemstones described for over two thousand years. Most frequently rubies or carbuncles (often red garnets ), which classical and medieval mineralogists did not differentiate, and less commonly other gems, including diamonds, emeralds, jade, and pearls (Ball 1938: 497).
Rosicrucianism (/ ˌ r oʊ z ɪ ˈ k r uː ʃ ə ˌ n ɪ z əm, ˌ r ɒ z ɪ-/) is a spiritual and cultural movement that arose in early modern Europe in the early 17th century after the publication of several texts announcing to the world a new esoteric order.
The Rose Cross (also called Rose Croix and Rosy Cross) is a symbol largely associated with the legendary Christian Rosenkreuz, a Christian Kabbalist and alchemist said to have been the founder of the Rosicrucian Order. [1] [2] The Rose Cross is a cross with a rose at its centre, which is usually red, golden, or white.
In quartz halogen lamps, a small amount of halogen gas is added to prolong the heater's operational life. The majority of the radiant energy released at operational temperatures is transmitted through the thin quartz tube but some of that energy is absorbed by the silica quartz glass tube causing the temperature of the tube wall to increase ...
Lampworking is a type of glasswork in which a torch or lamp is used to melt the glass. Once in a molten state, the glass is formed by blowing and shaping with tools and hand movements. It is also known as flameworking or torchworking , as the modern practice no longer uses oil-fueled lamps .