Helmholtz and the materialities of communication.
Lenoir
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Program in History and Philosophy of Science, Stanford University, California 94305-2024, USA.
D004864:Equipment and Supplies / Q000266:history*; D005858:Germany; D049672:History, 19th Century; D009885:Ophthalmology / Q000266:history*; D055095:Optics and Photonics / Q000266:history*