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Patent for a device, the Dynamoscope, which "reposes on the theory that the degree of vital energy in animated beings is in direct ratio to the rapidity, intensity, and number of the vibrations of the nervous system". A little like a stethoscope.
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Drug Compounding, CapsulesPlaces
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At head of title: A.D. 1861, 26th October. No. 2683.
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