Electro-physiology (1896-98) Electro-physiology electrophysiolog01bied Year: 1896-98 FIG. 128.—6, Capillary electrometer. (Fredericq.) is with the modern, sensitive galvanometer to demonstrate the ), due to spontaneous, or artificially induced, rhythmical activity of the heart, another method that has been much used of late, is still more advantageous; this is the capillary electrometer. This instrument, invented long ago by Lippman, but first used by physiologists at a much later period, consists essentially of a glass tube, drawn out into a fine capillary (Fig. 128, a and b, A), the open
Electro-physiology (1896-98) Electro-physiology electrophysiolog01bied Year: 1896-98 FIG. 128.—6, Capillary electrometer. (Fredericq.) is with the modern, sensitive galvanometer to demonstrate the ), due to spontaneous, or artificially induced, rhythmical activity of the heart, another method that has been much used of late, is still more advantageous; this is the capillary electrometer. This instrument, invented long ago by Lippman, but first used by physiologists at a much later period, consists essentially of a glass tube, drawn out into a fine capillary (Fig. 128, a and b, A), the open end of which dips into a vessel (B} filled with dilute sulphuric acid. The behaviour of the meniscus in the capillary tube is observed with the microscope. If current enters the capillary in one or the other direction, the surface polarisation will produce a change in the constant of capillarity, with a 2 D
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