American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 224
esenting a section,and b the steel withinthe brass of the balance,the weights for ad-justment being slidingblocks upon the rim. Itis based upon the prin-ciple that a prism ofsteel will bend moreeasily from the edge than in the oppositedirection; consequently the motion is greaterwhen curved by heat… … wide, say from 10° to 100° F., Mr. Dent hasfound them quite near enough for the ordinaryvariation of temperature, and more than usu-ally steady in their rate ; for the best are attimes very capricious in their action, showingthat there yet remains something to be studiedbesides compensation, for…
Clocks and watches
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