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Phonograph cylinders (also referred to as Edison cylinders after its creator Thomas Edison) are the earliest commercial medium for recording and reproducing sound.Commonly known simply as "records" in their heyday (c. 1896–1916), a name which has been passed on to their disc-shaped successor, these hollow cylindrical objects have an audio recording engraved on the outside surface which can ...
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Edison introduced wax cylinders approximately 4 + 1 ⁄ 4 inches (11 cm) long and 2 + 1 ⁄ 4 inches (5.7 cm) in external diameter, which became the industry standard. [1] They had a maximum playing time of about 3 minutes at 120 RPM , but around the turn of the century the standard speed was increased to (first 144) and then 160 RPM to improve ...
Nevertheless, the Blue Amberol format was the longest-lived cylinder record series employed by the Edison Company. [1] These were designed to be played on an Amberola, a type of Edison machine specially designed for celluloid records that did not play older wax cylinders. Blue Amberols are more commonly seen today than earlier Edison 2-minute ...
Blue Amberol Records was the trademark name for cylinder records manufactured by Thomas A. Edison, Inc. in the US from 1912 to 1929. They replaced the 4-minute black wax Amberol cylinders introduced in 1908, which had replaced the 2-minute wax cylinders that had been the standard format since the late 1880s.
Background Chlorine and caustic soda are produced at chlor-alkali plants using mercury cells or the increasingly popular membrane technology that is mercury free and more energy-
Test pressings were made at the normal 12-inch and 10-inch sizes in addition to the 7-inch sizes noted below for both 8 + 1 ⁄ 3 as well as 16 + 2 ⁄ 3. However, with mastering facilities of the period only going as low as 16 rpm, the quadruple-speed mastering required to get a playback speed of 4 rpm was deemed to have an insufficient audio ...
Celluloids are a class of materials produced by mixing nitrocellulose and camphor, often with added dyes and other agents.Once much more common for its use as photographic film before the advent of safer methods, celluloid's common present-day uses are for manufacturing table tennis balls, musical instruments, combs, office equipment, fountain pen bodies, and guitar picks.