. A text-book of comparative physiology for students and practitioners of comparative (veterinary) medicine . Side view of Mareys chronograph (after McKendriek). a, a, coils of wire;b, b, keepers of electro-magnets; c, vibrating style fixed to the steel plate e; d,binding screws for attachment of wires; + from interrupting tuning-fork; â tothe battery. has a little mass of steel attached to it, the whole working inunison with the tuning-fork, so that an interruption of the cur-rent implies a like change of position of the writing-style, whichis always kept in contact with the recording surface
. A text-book of comparative physiology for students and practitioners of comparative (veterinary) medicine . Side view of Mareys chronograph (after McKendriek). a, a, coils of wire;b, b, keepers of electro-magnets; c, vibrating style fixed to the steel plate e; d,binding screws for attachment of wires; + from interrupting tuning-fork; â tothe battery. has a little mass of steel attached to it, the whole working inunison with the tuning-fork, so that an interruption of the cur-rent implies a like change of position of the writing-style, whichis always kept in contact with the recording surface. Fig. 173 shows the arrangements for recording a single muscle contraction, andFig. 174 the character ofthe tracing obtained. A muscle-nerve prepa-ration, which usually con-sists of the gastrocnemiusof the frog with the sciaticnerve attached, clamped by Fig. 164.âMuscle-nerve preparation, showing a portion of the femur cut gastrocnemius muscle, sciatic nerve, and â. ... ,, . portion of femur of frog, for attachment Oil With the muscle, IS to a vise (after Rosenthal). made> Qn stimulatioilj to. THE STUDY OF MUSCLE PHYSIOLOGY. 179 raise a weighted lever which is attached to a point writing on acylinder moved by some sort of clock-work. In this case thecylinder is kept stationary during the contraction of the mus-cle ; hence the records appear as straight vertical lines. For recording movements of great rapidity, so that the in-tervals between them may be apparent, such an apparatus as is
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyo, bookyear1890
