. A text-book of animal physiology, with introductory chapters on general biology and a full treatment of reproduction ... Physiology, Comparative. 190 ANIMAL PHYSIOLOGY. strength, according to the parts of the muscle connected by the electrodes. The strongest is that resulting when the superfi-. FiQ. 187.—Representation of electrical currents in a muscle-rhombus (after Rosentlial). cial equator and the transverse center are connected; and it is found that the nearer these points are approached the stronger the current becomes, as is indicated by the greater extent of swing of the galvanometer
. A text-book of animal physiology, with introductory chapters on general biology and a full treatment of reproduction ... Physiology, Comparative. 190 ANIMAL PHYSIOLOGY. strength, according to the parts of the muscle connected by the electrodes. The strongest is that resulting when the superfi-. FiQ. 187.—Representation of electrical currents in a muscle-rhombus (after Rosentlial). cial equator and the transverse center are connected; and it is found that the nearer these points are approached the stronger the current becomes, as is indicated by the greater extent of swing of the galvanometer needle. In connection with these sur- prising phenomena, one naturally inquires whether such a mus- cle-current, for such it must be, is natural or artificial. Does such exist in a living muscle in its position in the body, or has the injury done to a muscle in its preparation by section, re- moval from the usual conditions of nutrition, and such like changes, been the cause of the current ? After much investigation, by some of the ablest physiolo- gists of the day, different answers are returned to these queries. Du Bois-Reymond maintains that such currents are natural, and may be obtained from muscle contracting in situ ; while Hermann and others believe that such a current is owing to the injury done by the section, and that the current from the equator to the poles of the section is due to the fact that the injured part is negative to the uninjured region. It is a fact that if the current be led off from an exposed muscle prior to section, it is relatively very weak. Further, the electrodes placed on the uninjured ventricle of an animal's. 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 Mills, Wesley, 1847-1915. New York, D. Appleton
Size: 1780px × 1403px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthormillswes, bookcentury1800, bookdecade1880, bookyear1889
