HYDE: EXPERIMENTS ON THE SKATE. 



5^ 



Curve 50. Effect of m/16 NaH2P04 solutions. 



Curve 60. 



Upper, gill-arch lever records of respiratory activity, show increase in 

 force, rate unchanged. Lower, cardiac lever, records first an increase in 

 rate and force; second, rapid, shallow; in ten minutes quite normal in 

 rate and force. 



Curve 51. m/8 NaH2Po4 solutions. 



CurTe 61. 



Upper, gill-arch lever records of respiration show increase in rate, and 

 after two minutes also in force; inspiration prolonged. Lower, cardiac 

 apex records. First minute prolonged diastole and increased force, fol- 

 lowed by slower rate; in five minutes quite nonnal in i-ate and force. 



3-Univ. Sci. Bull.. Vol. V, No. 4. 



