Ryan Electrometer, designed by Prof. Harris Ryan, early 20th century - Museum of Science and Industry (Chicago) - DSC06520.JPG
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Ryan Electrometer, designed by Prof. Harris Ryan, early 20th century Museum of Science and Industry (Chicago) DSC06520, Electrometers, Electromagnetic instruments in the Museum of Science and Industry (Chicago)
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Ryan Electrometer, designed by Prof. Harris Ryan, early 20th century Museum of Science and Industry (Chicago) DSC06520, Exhibit in the Museum of Science and Industry, Chicago, Illinois, USA. Photography was permitted in the museum without restriction.
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ライアン・エレクトロメーター。設計はハリス・ライアン教授、20世紀初頭の科学産業博物館。
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ライアン・エレクトロメータ。設計はハリス・ライアン教授、20世紀初頭の科学産業博物館。写真は美術館で制限なく許可された。
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electrograph electrometer electromagnet electromagnetism electromagnetic electromagnetic interaction