. General physiology; an outline of the science of life. 416 GENERAL PHYSIOLOGY discovered, was Kuhne's observation recalled and confirmed by means of more complete methods. The examination of a long series of free-living cells followed, all of which follow a law of polar excitation differing in various ways from that of nerve and muscle.^ The best method of employing galvanic stimulation with non- polarisable electrodes upon a slide under the microscope, is to use a slide (Fig. 197) upon which two strips of porous clay, such as is used in the porous cups of the galvanic element, are cemented
. General physiology; an outline of the science of life. 416 GENERAL PHYSIOLOGY discovered, was Kuhne's observation recalled and confirmed by means of more complete methods. The examination of a long series of free-living cells followed, all of which follow a law of polar excitation differing in various ways from that of nerve and muscle.^ The best method of employing galvanic stimulation with non- polarisable electrodes upon a slide under the microscope, is to use a slide (Fig. 197) upon which two strips of porous clay, such as is used in the porous cups of the galvanic element, are cemented parallel to one another {a, a^; the ends of these strips are united by a wall of insulating cement (colophonium and wax) (h, \); thus a small open box is formed, in which can be placed a drop of water containing the objects to be investigated. The brushes of ordinary non-polarisable electrodes are laid upon the two parallel strips. It is possible by means of this small contrivance to send nearly parallel currents through the microscopic objects, and, at the same. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Verworn, Max, 1863-1921; Lee, Frederic S. (Frederic Schiller), 1859-1939. London, Macmillan and co. , limited; New York, The Macmillan company
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