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Three-piece pocket monaural stethoscope, made from ivorine and nickel. French physician, Rene Theophile Hyacinthe Laennec originally invented the monaural stethoscope in 1816. The design is essentially a hollow metal cylinder. When assembled, the bell shaped end would be placed on the patient's body and the flat end, to the physician's ear. Monaural stethoscopes were the earliest form of diagnostic device for listening to internal sounds of the body (auscultation).This object dates from 1870, England.
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