PHYSIOLOGICAL STUDIES OF THE CHINOOK SALMON. 



437 



Table III. — Showing the blood pressure in the ventral aorta, the heart rate, and the pulse pressure of all the 

 examples that were considered normal under the conditions of experimentation. 



Date. 



1901. 



Aug. 8 



Aug. 9 



Aug. ll» 



Aug. 17 



Aug. 17 



Aug. 28 



Aug. 28 



Aug. 28 



Aug. 28 



\uu .'- 



Aug. 29 



Sept. l 



Aug. 31 



1902. 



Aug. 18 



Aug-. 18 



Aug. 19 



Aug. 19 



A ML'. 20 



Aug. 21 



Aug. 22 



lug. 23 



A ik 2i 



Aug 26 



Aug. 26 

 Aug. 26 



Aug. 27 



No. 



201 

 203 



2111 



206 

 207 

 208 

 209 

 210 

 212 

 213 

 211 

 215 



217 



Sex. 



Male .. . 

 Male .. 

 Female. 

 Mule .. . 

 Female. 

 Male ... 

 Female . 

 Female 

 Female. 

 Female . 

 Female. 

 Female. 

 Male ... 



Male ... 

 Male ... 

 Male . . . 

 Fi raali 

 Male ... 

 Male . . 

 Female 

 Female. 

 Male . . . 

 Female. 

 Female. 



Mean for 26 specimens. 



Mean for 11 malts 



Mean for 13 females . . . 



Length 

 in milli- 



!IM I. I 



520 

 540 

 850 

 540 

 900 

 050 

 850 

 730 

 890 

 900 

 1,160 

 870 

 920 



[28 

 459 



935 

 S2:; 

 113 

 918 

 672 

 777 

 752 

 829 

 866 



Pulse 

 pressure 

 in milli- 



IIH'tiTS, 



10 



3 

 14 



6 

 12 

 18 

 18 



8 

 It. 

 16 

 11 



1 I 

 16 



The highest pressure recorded in any single instance was that of a female 

 (No. 54) 89 centimeters in length, taken Aug. 28, L901, which had been artificially 

 spawned a few hours before. This female was in prime condition in so far as shown 

 by external appearances. It gave a ventral aortic pressure of 120 millimeters 



Fig 2.— Experiment Aug. 28. 1901, No. 48, male; length, 050 millimeters. Showing a type of lilnort pressure tracing from 

 the ventral aorta in which the respiratory movements affect the pressure. See also fig. 3. 



of mercury. A male 92 centimeters long, taken Aug. 31, 1901, gave almost as great 

 a maximal pressure, i. e., 108 millimeters of mercury. The minimal pressures 

 included in the above table are 15 and 47 millimeters, respectively, given by 

 Nos. 204 and 23. No. 23, taken Aug. 17, 1901, was marked in the notes as a 

 "prime-condition fish," yet the pressure is very low, although the heart rate is 

 considerably above the average. 



