An international system of electro-therapeutics : for students, general practitioners, and specialists . ^ the arrow in Fig 2, thecurrent passes from the headtoward the tail, , in a directionopposite to that of the shock ofthe gymnotus. Physical Investigation of theShock. — The principal resultswere : Polarization of electrodes,but no distinct electrolysis ofwater resulted. Passage of aspark was observed by the use ofa special apparatus. Induction,magnetization of soft iron, andelectric attraction were all dem-onstrated. Tensions.—The poles of theorgan lie at the head and the tail,and the
An international system of electro-therapeutics : for students, general practitioners, and specialists . ^ the arrow in Fig 2, thecurrent passes from the headtoward the tail, , in a directionopposite to that of the shock ofthe gymnotus. Physical Investigation of theShock. — The principal resultswere : Polarization of electrodes,but no distinct electrolysis ofwater resulted. Passage of aspark was observed by the use ofa special apparatus. Induction,magnetization of soft iron, andelectric attraction were all dem-onstrated. Tensions.—The poles of theorgan lie at the head and the tail,and the posterior half of the organ acts more feebly than the anterior,owing to greater resistance in the former. Relative Immunity from Electric Shocks.—Both Humboldt and. Fig. 3. E and E/, zinc electrodes in the trough containingthe fish; F, H, G^, the bell, hammer, and muscle ar-ranged to form an alarum; a, p, q, lever of the frog-interrupter; (?ii, its muscle; j), the platinum pointwhich rests upon the supporting plate ; q, amalgamatedcopper wire which dips into mercury: k, hj. keys; B,galvanometer. The action of the interrupter is suchthat only one shoclc can pass through the galvanometer,for by the contraction of the muscle ffn the galva-nometer circuit is brolien at q and not again alarum, of course, goes on ringing. ANIMAL ELECTRICITY. A-71 Collodon had expressed the opinion that electric fishes do not shockeach other when their batteries are discharged, and du Bois-Reymondsexperiments proved that the malapterurus is not affected b} currentsfrom a battery that suffice to kill other fish. The torpedo is viviparous,yet its 3^oung are not killed in utero hy its own discharges. It appears,then, that electric fishes can withstand both their
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectuterus, bookyear1894
