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Show Eiffel Tower Uieful During the period of experimentation experimenta-tion with the liquefaction of gases, Callletet, the noted French scientist, experimented with a manometer in the Eiffel tower. The tower was, used on account of Its great height. A soft steel tube was erected which ran up the framework of the tower. Every three meters (nearly ten feet) a projecting pro-jecting and stop cock were placed, and to each of these a glass tuhe, in length slightly more than three meters, was placed. Thus readings could be taken all the way up the tuhe. With this apparatus some 400 atmospheres of pressure could be reached. |