32/34
[ arrêter le diaporama ]

Sphygmograph

Ralentir la vitesse du diaporama Accélerer la vitesse du diaporama Ne pas répéter le diaporama Précédente Pause du diaporama Suivante
Sphygmograph.jpg R. J. Dodd’s patent cupping apparatusMiniaturesSteel Bow to diminish curvature of the spine R. J. Dodd’s patent cupping apparatusMiniaturesSteel Bow to diminish curvature of the spine R. J. Dodd’s patent cupping apparatusMiniaturesSteel Bow to diminish curvature of the spine R. J. Dodd’s patent cupping apparatusMiniaturesSteel Bow to diminish curvature of the spine R. J. Dodd’s patent cupping apparatusMiniaturesSteel Bow to diminish curvature of the spine

A, An ivory button which is pressed on the skin over the radial artery by a metal spring.
B, A continuous screw which works against the cogwheel
C. By rotating B, the lever
D is raised to a position in which its point scratches the travelling-plate
E (covered with blackened paper).
F, A box containing clockwork which moves E.
G, A screw by means of which the pressure of the spring is adjusted to the force of the pulse.