xxiv RESEARCHES ON IRRITABILITY OF PLANTS 



1 86. Effect of potassium cyanide . . . . . -339 



187. Arrest of pulsation of the heart of frog at diastole by the 



action of dilute lactic acid . . . . . . 339 



188. Arrest of pulsation of Desmodium at diastole by application 



of dilute lactic acid . . . . . . -340 



189. Arrest of pulsation of heart at systole, by the action of dilute 



sodium hydrate . . . . . . . .340 



190. Arrest of pulsation of Desmodium at systole by the application 



of dilute solution of sodium hydrate . . . -340 



