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    • František Křižík (1847–1941) - Nature

      Nature· 1 day ago

      s centenary falls this year. Born of poor parents on July 8, 1847, he was as much a man of science as an engineer. Obviously he had to seek a career in electrical engineering, and as a youth ...

    • Underground Lighting in Mines - Nature

      Nature· 1 day ago

      Special stress is laid on the importance of miners' hand lamps. Mr. Campin points out that most of the hand lamps now in use are virtually of the same type as those developed ...

    • Variable High Resistance Grid Leaks - Nature

      Nature· 1 day ago

      THE difficulty of obtaining very high resistances for certain forms of experiment can be overcome by the use of suitable photoelectric cells, as has been ...