a frictional machine directly upon the sensitive film pipes. under such conditions as would enable me to deter- The gasometer comprises the usual water-sealed bell mine certain facts about the path of the current rising and falling in a tank. through a conductive surface. Accordingly 1 placed The… … which the flow of water can be entirely cut AN AUTOMATIC ACETYLENE-GENERATOR. off. The valve, B, is automatically operated by means of a lever connected by a chain with the gasometer-bell. When the bell has reached while in full action, and directed the spark directly its lowermost position the…
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