If a lever, 40 efia#39;ective inches long, will, by. a certain power thrown successively on it, in 13 hours, raise a weight 104 feet; in what time will two {other levers, each 18 effective inches long, raise an eciual weight 73 feet? If 40 : 104 : : 18 2 46.8, anbsp;...

Title | : | A Compendium of Mechanics, or Text book for engineers, mill-wrights, machine-makers, founders, smiths, &c. containing practical rules and tables ... also examples for each rule ... for the use of operative mechanics, etc |

Author | : | Robert Brunton |

Publisher | : | - 1831 |

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