Image from page 442 of “General physiology; an outline of the science of life” (1899) – more Marine Life goodness curated by www.SardineRunPE.co.za
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Title: General physiology; an outline of the science of life
Year: 1899 (1890s)
Authors: Verworn, Max, 1863-1921 Lee, Frederic S. (Frederic Schiller), 1859-1939, ed. and tr
Publisher: London, Macmillan and co., limited New York, The Macmillan company
Contributing Library: Columbia University Libraries
Digitizing Sponsor: Open Knowledge Commons
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tating, blackened drum by means of a writing-lever. traction. All continued contractions that are performed in thehuman body under nervous influence are, like tetanus artificiallyproduced, discontinuous phenomena composed of many singlecontractions following one another in rapid succession. It should be mentioned that there are forms of living substancethat are not influenced at all by induction-shocks, either bysingle ones or by shocks succeeding one another rapidly or slowly,however strong they may be. Such objects are Orbitolites,Amphistegina, and other marine Bhizopoda. Their protoplasmrequires for reaction a longer duration of the stimulus than thelightning-like induction-shock possesses.1 As regards other excitation-effects of galvanic stimulation,mechanical motile effects are produced, not only in contractile 1 Cf. Verworn (92, 2). 426 GENERAL PHYSIOLOGY substances, but in plants that, like Mimosa, move by changesof turgescence. If single induction-shocks be allowed to act upon
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