Image: Photophone transmitter 4074931746 9f996df841 b
Size of this preview: 800 × 591 pixels. Other resolutions: 320 × 236 pixels | 1,024 × 756 pixels.
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Description: Illustration of the photophone's transmitter, originally from: El mundo físico : gravedad, gravitación, luz, calor, electricidad, magnetismo, etc. / A. Guillemin
by: Guillemin, Amédée, published by: Barcelona Montaner y Simón, 1882
Usage Terms: Public domain
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