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ABSTRACT July 31, 1846.— In 140, Lord Armstrong, then a lawyer thirty years of age, in a letter to the _Mechanics' Magazine_, directed attention to the advantage of water und of

pressure as a mehanical agent and a reserv of power six years later he erected a crane on the quary at new vastle which was worked by water power, and on July 31, 1846, took out a patent for

an “apparatus for lifting, lowering and hauling.” This was the begining of the present extended use of hydraulic pressure for cranes, capstans, lifts, gun machinery, and machine tools. To

develop his machinery, Armstrong in 1847 joined tho small engineering firm of Dorikin, Cruddas, Potter, and Lambert, of Elswick, and from this sprang the world-famous engineering works on

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support Authors * E. C. S. View author publications You can also search for this author inPubMed Google Scholar RIGHTS AND PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE THIS

ARTICLE S., E. Calendar of Discovery and Invention. _Nature_ 120, 172 (1927). https://doi.org/10.1038/120172a0 Download citation * Issue Date: 30 July 1927 * DOI:

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