and inven- the ozone apparatus, telegraph instruments with alter- nate currents, and translation and automatic discharge tions emanated from him and from the factory under designed to normally stay closed, opening automati- for cable lines, were devised in 1857. The Sardinia, his direction. cally… … and 1877 on the change of conducting power then overbalances the weight and swings E%^\ £> downward, thus opening the gate. The gate of selenium by heat and light. will remain open until the water falls below He had continued reading papers and ad- NORTON'S AUTOMATIC WATER GATE. the opening leading…
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