£ titntifit 6lnuritan+ � ticntifit 6lmtritan. such always has and . ev � r � ill be, a rUlingen-1 hi� services, exclusive of � atent ri � �ts ; and if' 1 our description of its effects for a mere state deavor. On every side It IS allowed that the still greater he was to receive an additional comment of what the law is, and its own statement SCIENTIFIC AMERICAN, in point of vigor, inter-pel!'sation of $400 for eac? per cent. of power i of what the law is, for a description of its ef est,

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... ity, and influence, stands at thehead gamed. In accordance With the contract, the fe cts. It thus confuses itsel£ of all a�logous journals; indeed, we can add, useful effect of two of these wheels were tested A cannon ball falling from an elevation will NEW -YORK, SEPTEMBER 15, 1855. as an absolute fact, that its regular weekly cir-by a �ery perfect Prony dynamo � eter, and the acquire a uniformly accelerated velocity. The