A multichannel water-mercury manometer

Summary

A description is given of a four- and five-channel water-mercury manometer for use in physiology. Glass tubes, styrofoam floats, glass capillaries and other parts are mounted on three metal brackets supported from a vertical rod. Pointers attached to the capillary tubes are guided between stretched parallel threads. The construction ensures accurate alignment to record synchronously the pressures in different parts of the vascular system. The whole width of the kymograph band may be used for each pressure curve. It is usually not necessary to regulate the synchronization of the different channels after changing the kymograph band.