On the Electromotive Properties of the Leaf of Dionaea in the Excited and Unexcited StatesSecond Paper . i7 | ;;;:. N | minute it had changed from f 2-5 to {3*0, and there was a corresponding change inthe excitatory variation as observed by the electrometer. Before modification theexcitatory effect consisted of an excursion in the j direction, which was preceded by asharp jerk in the f, and followed by a prolonged f after effect. After modificationa preliminary j effect was followed by a prolonged \ after effect. With the samedifference of potential, the galvanometric deflection was 68 after m
On the Electromotive Properties of the Leaf of Dionaea in the Excited and Unexcited StatesSecond Paper . i7 | ;;;:. N | minute it had changed from f 2-5 to {3*0, and there was a corresponding change inthe excitatory variation as observed by the electrometer. Before modification theexcitatory effect consisted of an excursion in the j direction, which was preceded by asharp jerk in the f, and followed by a prolonged f after effect. After modificationa preliminary j effect was followed by a prolonged \ after effect. With the samedifference of potential, the galvanometric deflection was 68 after modification, 26before. PROPERTIES OF THE LEAF OF DIOKdBA. 439 Experiment V., Aug. 18 (diagram 6).—Here the difference was 110*6, butdiminished to 9*3 during the first rheotome observation. The character of theexcitatory effect resembled that observed in Experiment IIL, but the [ phase lastedlonger, The after effect, as in Experiment III., was {. Diagram 6,. A second observation was made an hour after the first, in which the preparation wasfound to be changing in the direction of modification, though no extraneous currenthad been led through it, for the { phase was both weaker and of much shorterduration, as evidenced by the fact that during the second second the under surfacewas feebly negative, instead of strongly positive. Modification was promptly effectedin the usual way. The difference, which had diminished to {5*6, changed signand became |35, and the resistance had so diminished that with the same lengthof wire the deflection, which had before been 280, became 75 X 10. In this case theelectrometer displayed the change which had occurred in the electrical response verystrikingly. Before modification it resembled photograph 12 ; after, photograph 1. Section 6.—Photographic Records. I have now to submit to the reader, in further illustration of the nature of theexcitatory effect, as observed before and after modification, a series o
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Keywords: ., bookcentury1800, bookdecade1880, bookidphiltrans019, bookyear1888
