Jigsaw Puzzle : Carbon microphone, invented in 1878 by David Edward Hughes, 1890
Jigsaw Puzzles from Heritage Images
Carbon microphone, invented in 1878 by David Edward Hughes, 1890
Carbon microphone, invented in 1878 by David Edward Hughes, 1890. The apparatus was said to be so sensitive that a fly walking on the sounding-board could be heard by an observer on a telephone several miles away. From Electricity in the Service of Man translated by R Wormell from the German of Alfred von Urbanitzky. (London, 1890)
Media ID 14846427
© Ann Ronan Picture Library / Heritage-Images
Carbon Electric Electricity Hughes Innovation Invention Microphone Sound
Jigsaw Puzzle (400 Pieces)
400 piece puzzles are custom made in the UK and hand-finished on 100% recycled 1.5 mm millboard. There is a level of repetition in jigsaw shapes with each matching piece away from its pair. The completed puzzle measures 31x47cm and is delivered packaged in an attractive presentation box specially designed to fit most letter box slots
Jigsaw Puzzles are an ideal gift for any occasion
Estimated Product Size is 47.2cm x 31.5cm (18.6" x 12.4")
These are individually made so all sizes are approximate
Artwork printed orientated as per the preview above, with landscape (horizontal) or portrait (vertical) orientation to match the source image.
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