An international system of electro-therapeutics : for students, general practitioners, and specialists . ng,if not actually killing, the largest animals, Humboldt informs lis thatthe direction of certain roads had to be changed in consequence of thenumbers of horses annually killed as they passed through the pondswhich these fish inhabited. Its electric organs consist of two pairs oflong structures situated immediately beneath the skin,—one pair on theback of the tail and the other along the anal fin. The organ is made up,as is usual, of cells filled with a sort of gelatinous material, and in
An international system of electro-therapeutics : for students, general practitioners, and specialists . ng,if not actually killing, the largest animals, Humboldt informs lis thatthe direction of certain roads had to be changed in consequence of thenumbers of horses annually killed as they passed through the pondswhich these fish inhabited. Its electric organs consist of two pairs oflong structures situated immediately beneath the skin,—one pair on theback of the tail and the other along the anal fin. The organ is made up,as is usual, of cells filled with a sort of gelatinous material, and in thiscreature are so small that two hundred and forty have been counted in (A-67) A-68 MILLS. the space of one inch. It is estimated that about two hundred nervesare supplied to the whole apparatus, these being derived from the anteriorbranches of the spinal nerves, and, as applies to the nerves of all electricfishes, are larger than those supplied to other parts. It is clear that ananimal capable of giving such powerful shocks is not as well adapted fornice experiments as less-powerful fishes. np-. Fig. 1.—The Electric Fish Torpedo, Dissected to Show Electric Apparatus. (Huxley.) b, branchiae ; c, brain; e, electric organ; g, cranium ; me, spinal cord; n, nerves to pectoral fins;nl, nervi laterales ; np, branches of pueumogastric nerves to electric organs; o, eye. I. Following the historical development of the subject, we proceedto give some account of the important researches of Prof. Emil du Bois-Reymond on the tropical sheath-fish, the malapterurus. This fish isfound in the rivers of Africa, including the Nile, specimens occasionally ANIMAL ELECTRICITY. A-69 reaching a length of four feet. The electric organ extends over thegreater part of the body, lying beneath aponeurotic membranes underthe skin. The cells making up the organ are rhomboidal and filled witha somewhat firm jelly. The nerve-supply consists of a single strongfibre, which gives off branches to different pa
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectuterus, bookyear1894
