30 



EXPERIMENTAL PHYSIOLOGY. 



nect the secondary terminals of the inductorium with the 

 muscle lever and with the femur. On a rapidly moving 



surface secure records of twitches immediately after the muscle 

 has been immersed in isotonic salt solution at the following 

 temperatures, each for three minutes: 4 C., 10 C., 15 C., 

 25 C., 30 C., 35 C., and 40 C. Use the same 



