HYDE: EXPERIMENTS ON THE SKATE. 

 Table IX. Effect of HCl solutions. 



Curve 37. Effect of m/64 HCl on cardiac and respiratory activity and 

 blood pressure. 



Upper, gill-arch lever respiratory curve shows for tM^o minutes in- 

 creased force, rate unchanged. Lower, apex lever cardiac curve for two 

 minutes increased force, decreased rate. 



Curve 38. m/32 HCl injection. 



Upper, cardiac Hiirthle manometer curve and blood pressure shows de- 

 creased rate and increased force and rise of blood pressure for one 

 minute. 



Lower, gill-arch lever record of respiratory activity shows rate less, 

 force unchanged for one minute. 



