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Portrait of Yakov Rostovtsev, his Wife Vera, Sons Nikolai and Mikhail and Daughter Alexandra

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Portrait of Yakov Rostovtsev, his Wife Vera, Sons Nikolai and Mikhail and Daughter Alexandra

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Public domain photograph related to the history of Russia, free to use, no copyright restrictions image - Picryl description

Sergey Zaryanko (1818–1870) was a Russian inventor, engineer, and scientist. He is best known for his contributions to the development of early electric lighting systems. Zaryanko constructed one of the earliest electric lamps in 1860, which he called the "electric candle." This device used a carbon filament enclosed in a vacuum tube and illuminated when an electric current passed through it. Zaryanko's work on electric lighting laid the groundwork for further advancements in the field, leading eventually to the development of practical incandescent light bulbs. However, his contributions were somewhat overshadowed by those of other inventors like Thomas Edison and Joseph Swan, who achieved greater commercial success with their own versions of the incandescent light bulb.

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1850 - 1854
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Wikimedia Commons
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public domain

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