108 LABORATORY GUIDE IN PHYSIOLOGY. 



elasticity of the artery affect the tracing ? How 

 does strength or rate of heart-beat affect it? 

 Make a list of the facts regarding the condition of the 

 circulatory system which maybe determined with the help 

 of the sphygmograph. Make a list of the precautions 

 necessary to observe in the use of the sphygmograph. 



