The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 465
s a shade supported uponthe vertical rod e, passing throughthe post and united by a joint atits lower end, with the bell-crankF, to which is likewise suspendedthe ball or weight M, to the otherend of the crank F, a joint is at-tached, with which is connected astrong wire g, which is led like…
Architecture · Civil engineering · Science
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