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COLLECTED PHYSICAL PAPERS
373
In the following record the normal heart-beat of fish is seen to be greatly depressed by KBr solution. Subsequent application of Abroma extiact caused a remarkable revival of activity (fig. 122). Even more remarkable
Fig. 122. Effects of depressant and stimulant on Cardiac pulsation of fish. The first series represents normal pulsation; the second, depression under KBr solution; the third exhibits revival by Abroma extract.
are the exactly parallel reactions of KBr and Abroma on rhythmic pulsations of Desmodium gyrans (Fig. 123).
Fig. 123. Effects parallel to the above in pulsations of Desmodium plant.
