Stethoscope. A- Possibly Hare's, cf. Down, 1906. B- Possibly Baron's cf. Maw& Thompson, 1882. C and D- are both of the Fergusson or Stoke's type, cf. Krohne & Sesemann, 1779, p. 108.

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: Stethoscope. A- Possibly Hare's, cf. Down, 1906. B- Possibly Baron's cf. Maw& Thompson, 1882. C and D- are both of the Fergusson or Stoke's type, cf. Krohne & Sesemann, 1779, p. 108. Wellcome Collection. Source: Wellcome Collection.

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