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 contemporary uses are table tennis balls, musical instruments, combs, office equipment, and guitar picks.
invented by Anyos Jedlik
invented by William Reid Clanny
A safety lamp is any of several types of lamp that provides illumination in…
invented by Abraham Louis Breguet
A watch is a portable timepiece intended to be carried or worn by a person. It…
invented by Thomas Edison
A phonograph, in its later forms also called a gramophone (as a trademark since…
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