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  • A sphygmograph: an instrument (also known as a 'pulsometer') for recording graphically the features of the pulse and variations in blood pressure. Wood engraving, 1850/1880?.
  • A sphygmograph: an instrument (also known as a 'pulsometer') for recording graphically the features of the pulse and variations in blood pressure. Wood engraving, 1850/1880?.