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INVAR

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Originally appearing in Volume V14, Page 717 of the 1911 Encyclopedia Britannica.
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INVAR , an alloy of See also:

nickel and See also:steel, characterized by an extremely small coefficient of thermal expansion; it is specially useful in the construction of pendulums and of See also:geodetic measuring apparatus, in fact, in all See also:mechanical devices where it is an See also:advantage to avoid temperature See also:compensation. The name was chosen as expressing the invariability of its dimensions with See also:heat.

End of Article: INVAR

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