62 LABOR A TOR Y G VIDE IN PHYSIOLOG Y. 



other to the tracing lever. This muscle should not be 

 made to lift as heavy a weight as is used for the gastroc 

 nemius. 

 4. u&sgrvations. 



(#) Direct versus indirect stimulation. 



(1) Put saturated salt solution upon the sartorius di- 

 rect stimulation. If it responds take a tracing of the 

 response. 



FIG. 14. 

 FIG. 14. The Kymograph. For description see Appendix C. 



(2) Mount the second sartorius and try mechanical 

 and thermal stimuli, tracing and recording results. 



(3) Prepare and mount a gastrocnemius preparation, 

 from a frog that was not curarized. Apply various 

 stimuli to the nerve indirect stimulation as in the 

 previous lesson and record results. 



