rs are made of some metalor mineral whose melting point is extremely high. InFig. 52 a bar of metal, AB, is fastened at one end andis free to expand lengthwise ; in so doing it moves theindex lever, C, indicating the temperature. Other Applications. — There are many other practicalapplications of… … Heat. 69 shrunk on, i,e, put in place while hot and allowed totighten themselves by the contraction which comes incooling. The gridiron pendulum is so constructed ofbrass and steel bars, which expand at unequal rates, thatthe length of the pendulum is kept practically unchangedby changes in…
Physics
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