Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 107
asvisiting in Georgia and became much interestedin this huge tree. AN INGENIOUS CLOCK A CLOCK that resembles a perpetual-motion de-vice operates by the weight of a number of steelballs that rest upon one side of a wheel surround-ing the face. As they reach the lowest point,they drop into a runway… … THE CLOCK RUN BY bTEEL BALLS. regulates the clock, it requires springs to keep itgoing, so it cannot be classed with the perpetual-motion machines. iQM] NAiLJRE AND SCIENCK FOR VOUNC; JUl.KS 659 ^BECAUSE- WFI WANT TO KNOW KOTE: So many questions are received tliat ive can under-take to answer in…
Children's literature
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