The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 244
using the jack,tighten the pin H,and open the air-tapI, When it is requi-site to lower theweight, slacken the pinH. When tlie jack isnot in use, close theair-tap I. Should thewater get too low,take out the tap I,and fill the cisternwhen the ram is down.The ram can lie presseddown by hand wheniLjJi… … Mr. WHISHAWS TELEGRAPHIC INVENTIONS. We were present in the course of last week at a pri\ate view ofthe numerous contrivances invented by Mr. AVhishaw for tele-graphic communications. A great part of these in\entions applyonly to the communications at short distances, and of these animproved…
Architecture · Civil engineering · Science
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