1856 introductions

kitchen appliance intended for mixing, folding, beating, and whipping food ingredients

steel production method

Magnetoresistance is the tendency of a material (often ferromagnetic) to change the value of its electrical resistance in an externally-applied magnetic field. There are a variety of effects that can be called magnetoresistance. Some occur in bulk non-magnetic metals and semiconductors, such as geometrical magnetoresistance, Shubnikov–de Haas oscillations, or the common positive magnetoresistance in metals. Other effects occur in magnetic metals, such as negative magnetoresistance in ferromagnets or anisotropic magnetoresistance (AMR). Finally, in multicomponent or multilayer systems (e.g. mag

system of operation used to provide energy to operate autoloading firearms

thumb|right|Letter from Perkin's son, with a sample of dyed silk Mauveine, also known as aniline purple and '''Perkin's mauve''', was one of the first synthetic dyes. It was discovered serendipitously by William Henry Perkin in 1856 while he was attempting to synthesise the phytochemical quinine for the treatment of malaria. It is also among the first chemical dyes to have been mass-produced.

early version of the rules of soccer

one-cent piece struck by the Mint of the United States