Joseph Henry
17971878
American physicist and engineer who served as the first Secretary of the Smithsonian Institution and contributed to the discovery of induced electric current
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ফিল্টার প্রয়োগ করে জীবনে সব দেখুন17971856
German poet, writer, and literary critic whose lyrical poetry inspired composers like Schumann and Schubert, and whose prose offered incisive social commentary
