244 



T. BRAILSFORD ROBERTSON. 



Temprrature. 



24.75 

 20.75 



15-75 



Temperature. 

 15 



EXPERIMENT i. 



EXPERIMENT 2. 



Peats per Second. 



6-53 



4-43 

 2.47 



Beats pet 'Second 



2-53 



2 7 



Temperature. 

 15 



17 

 19 



21 

 23 



2 9 



Rate at 25' 

 Rate at 15' 



EXPERIMENT 3. 



Rate at 27' 



= 2. 



4-39 

 6. 1 1 



Beats per Second 

 2.63 



2-95 



3-67 

 4.87 

 5.05 

 6.59 



6. 10 

 7-375 

 Rate at 29 



Temperature. 

 13 



15 



17 

 19 



21 

 23 



25 

 2 7 

 29 



Rate at 23 

 Rate at 13 



Rate at 27 

 Rate at 17 



Temperature 

 11 



13 



I 9 

 21 



2 5 

 29 



3 1 



Rate at 17 " 7 ' Rate~~aT7cT 

 EXPERIMENT 4. 



= 2.OI 



= 2.25 ; 



= 1. 80; 



Rate at 



Beats per Second. 

 2.22 

 2.88 

 3-46 



2-95 



3.91 



5 



5-7i 



6.23 



615 



Rate 

 Rate 



Rate 



EXPERIMENT 5. 



Beats per Second. 

 2-31 



at 29 



- = -> 08 



f^. " *\j{j . 







4.12 



4-79 

 6.1 5 

 6.22 

 6.1 7 

 7.01 



f 



at 19 



Remarks 



Irregular pauses in 

 diastole accompanied 

 by very slight quick 

 beats. 



Still irregular. 

 Regular. 



Gills stopped 



