50 



KANSAS UNIVERSITY SCIENCE BULLETIN. 



respiratory force decreases with increased strength of the so- 

 lution, while the blood pressure rises in all concentrations em- 

 ployed, showing that increase in blood pressure is not neces- 

 sarily associated with rise of respiratory activity but rather 

 with force of heart-beat. 



Table VII Showing the effect of NaOH so'utions upon respiratory, 

 cardiac and blood- pressure changes. 



Curve 30. Effect of m/64 NaOH injections. 



curva 30. 



Upper, Hiirthle curves of cardiac and blood-pressure changes; decrease 

 in rate, increase in force and blood pressure for two minutes. Lower, 

 gill-arch lever curves of respiratory changes unaltered. 



Curve 31. Effect of m/32 NaOH solutions. 



Cxirve 31. 



Upper, Hiirthle curves of cai'diac and blood-pressure changes show a 

 first effect of two minutes of greatly increased force and slight decrease 

 in rate of cardiac rhythm. The blood pressure increased for two minutes, 

 respiratory rhythm decreased very little if at all. 



Curve 32. Effect of m/8 NaOH solutions. 



Curre 32, 



Upper, Hiirthle curves of cardiac and blood-pressure changes show in- 

 creased blood pressure and rhythm. Lower, respiratory curves, mcieased 

 rate but decreased force. 



