50.0 MB (2.5 MB compressed)
5173 x 3378 pixels
43.7 x 28.7 cm ⏐ 17.2 x 11.3 in (300dpi)
SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Three monaural stethoscopes, one in fruitwood (top), on in white metal (left), and one in ebony (right). French physician, Rene Theophile Hyacinthe Laennec invented the monaural stethoscope in 1816. This design, which is essentially a wooden cylinder with a hole bored out down the centre, was the earliest form of diagnostic device for listening to internal sounds of the body (auscultation). These are English and date from around 1870.
Model release not required. Property release not required.