Herbert Spencer, Principles of Psychology
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Alexander Bain, The Senses and the Intellect
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The First Phonogramic Poem, “The Phonograph’s Salutation”
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The “perfected” phonograph
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Patent issued for the tinfoil phonograph
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Patent filed for the tinfoil phonograph
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Conception and invention of the tinfoil phonograph
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Holmes invents a hand-held stereoscope.
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Brewster Publishes The Stereoscope
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Crystal Palace opens
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