INVAR  , an alloy of See also:

• NICKEL
• NICKEL (symbol Ni, atomic weight 58.68 (0=16))

nickel and See also:

• STEEL, FLORA ANNIE (1847– )

steel, characterized by an extremely small coefficient of thermal expansion; it is specially useful in the construction of pendulums and of See also:

• GEODETIC

geodetic measuring apparatus, in fact, in all See also:

• MECHANICAL

mechanical devices where it is an See also:

• ADVANTAGE

advantage to avoid temperature See also:

• COMPENSATION (from Lat. compensare, to weigh one thing against another)

compensation . The name was chosen as expressing the invariability of its dimensions with See also:

• HEAT (0. E. haktu, which like " hot," Old Eng. hat, is from the Teutonic type haita, hit, to be hot; cf. Ger. hitze, heiss; Dutch, hitte, heet, &c.)

heat .