General physiology; an outline of the science of life . clusion ofthe protoplasm. Demoor narcotized cells of Spirogyra withchloroform so that the protoplasm was completely paralysed, andfound that, notwithstanding, the nucleus went through all thestages of division undisturbed, and showed the characteristicchanges that it exhibits in an uninjured cell in division. Inthe leucocytes of the frog the nucleus has the power of amoeboidmotion, and Demoor was able to paralyse the protoplasm by theuse of chloroform without interrupting the movements of thenucleus (Fig. 259). These discoveries show that
General physiology; an outline of the science of life . clusion ofthe protoplasm. Demoor narcotized cells of Spirogyra withchloroform so that the protoplasm was completely paralysed, andfound that, notwithstanding, the nucleus went through all thestages of division undisturbed, and showed the characteristicchanges that it exhibits in an uninjured cell in division. Inthe leucocytes of the frog the nucleus has the power of amoeboidmotion, and Demoor was able to paralyse the protoplasm by theuse of chloroform without interrupting the movements of thenucleus (Fig. 259). These discoveries show that individual pro-cesses, take place in the nucleus in a certain measure independentof the influence of protoplasm. Naturally it cannot be decidedat present whether these processes continue only because after theexclusion of the protoplasm there are still contained in thenucleus protoplasmic substances which must be consumed beforethe processes in question cease, or whether the latter are notdirectly dependent upon protoplasmic substances. Possibly both. Fig. 259.—Leucocyte from the frog in a state of chloroform narcosis ; the protoplasm is completelyparalysed, while the nucleus still makes amoeboid movements. Cf. a, b, c, and d. (AfterDemoor.) cases are here realized; this appears very probable when it isborne in mind that the nucleus has direct metabolic relations withthe external medium, without the mediation of the doubt there are substances that pass from the externalmedium through the protoplasm unchanged into the nucleus,to be employed there for metabolism. This is certainly thecase with water in a certain quantity, which is absolutelynecessary to every vital process. The water is able to diffusecontinually through the cell-membrane into the protoplasmand through the nuclear membrane into the nucleus. It ispossible that along with the water many substances which aredissolved in it also come from the outside into the nucleusto engage there in chemical t
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