Devices And Techniques Prints

German scientist with a detective camera, circa 1910s
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Darwin-Coxe Machine, in which insane were swung until quiet
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English coffin for confining the insane
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Early recording device: The Berliner gramophone detail of turntable, patent, 1896
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Early recording device: The Berliner gramophone detail patent, 1896
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Early recording device: The Berliner gramophone detail patent, 1896
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Early recording device: The Berliner microphone patent, 1880
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Early recording device: The Berliner Gramophone patent diagram, 1887
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Early recording devices: top: recording diaphragm and stylus
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A recorder, recording section of a gramophone, 1888
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Early recording device: The Berliner gramophone detail of record grooves, patent, 1895
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Early recording device: The Berliner microphone patent, 1880
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