Publisher's Synopsis
Excerpt from The London Journal of Arts and Sciences, Vol. 8: Containing Full Descriptions of the Principles and Details of Every New Patent, Also Original Communications on Objects Connected With Science and Philosophy, Particularly Such as Embrace the Most Recent Inventions and Discoveries in Practical Mechanics
XI. Spinney's Gas Valve; Young's Windlass; Seaward's Steam Boiler; Dixon and Vardy's Cock; and Rennie's Friction Apparatus.
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