THE NERVELESS MUSCLE 



36 



A method of obtaining the curve of swelling of a contracting muscle which 

 is better adapted for mammalian muscle is to use the pince myographique or 

 myographic forceps of Marey (fig. 36, F). The muscle is grasped by this, and 



FIG. 36. MYOGRAPHIC FORCEPS OP MAREY. F, FORCEPS FOR GRASPING THE MUSCLE THE CON- 

 TRACTION OP WHICH IS TO BE RECORDED. THE TWO BLADES OP THE FORCEPS ARE DRAWN TO- 

 GETHER BY AN INDIA-RUBBER BAND. T, RECEIVING TAMBOUR. THE AIR IN WHICH is COMPRESSED 

 BY THE SWELLIN-G OP THE MUSCLE. AND FROM WHICH THE PRESSURE is TRANSMITTED BY AN 

 INDIA-RUBBER TUBE TO T', THE RECORDING TAMBOUR, THE LEVER OF WHICH WRITES ON 

 A REVOLVING DRUM. 



its contraction affects a tambour (T) which is connected by rubber tubing 

 to another tambour (T'), writing upon the drum. The muscle is stimulated 

 (1) at the point of application of the forceps, and (2) at some distance from the 

 forceps. The difference of time between the two resulting curves is measured, 

 and the rate of passage of the muscle wave calculated therefrom. 



