Edison’s megaphone

Victorian illustration to download showing a picture of two men operating the megaphone invented by Edison while a woman looks on. A large speaking trumpet is flanked by two hearing trumpets. Normal speech could be carried for about two miles using this device.

#Picture Number ST148


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Your download illustration: a standard jpeg greyscale image file (300dpi, around 3mb) for making quality A4-size prints. Apply colour or tint the background in any design program.