Marey type sphygmograph,19th century

Numéro d’image : 11655912
Marey type sphygmograph,19th century
Marey type sphygmograph,made in France around 1870. This instrument is boxed,made from gilt metal and has a clockwork mechanism. The sphygmograph,originally invented in 1854 by German physiologist Karl von Vierordt,was used by physicians in the nineteenth century as a means of observing and measuring the pulse externally and non-invasively. The radial pulse wave forms would be traced with a mounted pen. The Marey type was developed in 1863 and named after its designer,Etienne-Jules Marey (1830-1904). This was considered an improved version of the earlier model due to its portability
Licence : Droits gérés
Crédit: Science Photo Library
Taille de l’image : 5449 px × 3576 px
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