A text-book of physiology for medical students and physicians . ctive material as upon a piece of machin-ery and causes it to shorten by imbibition. Contraction, in a word,is a phenomenon of thermic imbibition. Engelmann has given anappearance of verisimilitude to this hypothesis by constructingan artificial muscle from a piece of violin string. The apparatusused is illustrated in Fig. 27. A catgut string (m) is surroundedby a coil of platinum wire (w) through which an electrical currentmay be sent. The object of this arrangement is to heat the catgutsuddenly. The platinum coil should not actu
A text-book of physiology for medical students and physicians . ctive material as upon a piece of machin-ery and causes it to shorten by imbibition. Contraction, in a word,is a phenomenon of thermic imbibition. Engelmann has given anappearance of verisimilitude to this hypothesis by constructingan artificial muscle from a piece of violin string. The apparatusused is illustrated in Fig. 27. A catgut string (m) is surroundedby a coil of platinum wire (w) through which an electrical currentmay be sent. The object of this arrangement is to heat the catgutsuddenly. The platinum coil should not actually touch the catgut is attached to a lever, as shown in the figure. Thecatgut is thoroughly soaked by immersing it in a beaker of water * For a general presentation of this view see McCallum, Science,October, 1910; Bernstein, Archiv f. d. ges. Physiologie, 85, 271, 1901. t Engelmann, Ueber den Ursprung der Muskelkraft, Leipzig, 1893;see also Pfliigers Archiv, 7, 155, 1873; and Archiv f. Physiologie,1907, 25. 74 THE PHYSIOLOGY OF MUSCLE AND „» was: tfMKaettswss e^sft; line beneath the curve.
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