Carl Louis Schwendler
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Carl Louis Schwendler (1838 - 1882) was a German electrician and one of the first proponents of the Tungsten based incandescent light bulb. He also published an influential textbook on telegraphs, and worked in British India at a senior post in the Telegraph Department. He was commissioned by the Railways to perform a feasibility study of lighting Indian Railway stations by electric lamp.
Schwendler was also the owner of a small menagerie which formed the nucleus of the Alipore Zoological Gardens in Kolkata (then Calcutta).