On the Electromotive Properties of the Leaf of Dionaea in the Excited and Unexcited StatesSecond Paper . 13. 0Lull,6 Imp. Car/ib. /£#£/> ,?£^ PROPERTIES OF THE LEAF OF DIOKffiA. 449 Fig. 11. Photographic record of the fundamental experiment in a perfectly unmodified 12. Effect as led off from the same contacts in the same leaf after modification. [The photograph shows an imperfection, due to a temporary defect in the electrometer. The first of the four notches ought to have been deeper.]Fig. 13. Effect often observed in leaves just prepared. It corresponds to a s
On the Electromotive Properties of the Leaf of Dionaea in the Excited and Unexcited StatesSecond Paper . 13. 0Lull,6 Imp. Car/ib. /£#£/> ,?£^ PROPERTIES OF THE LEAF OF DIOKffiA. 449 Fig. 11. Photographic record of the fundamental experiment in a perfectly unmodified 12. Effect as led off from the same contacts in the same leaf after modification. [The photograph shows an imperfection, due to a temporary defect in the electrometer. The first of the four notches ought to have been deeper.]Fig. 13. Effect often observed in leaves just prepared. It corresponds to a state intermediate between figs. 10 and 11. —In all cases the difference was compensated just before the observationwas made. Mdccolxxxviil— b. 3 m. PLATE 69. Figs. 1 to 4. Photographic records of the Fundamental Experiment in differentleaves. (See Phil. Trans., 1882, p. 25.) The leaf is excited at intervalsof about 5 by a single induction shock led through the opposite lobe at themoment indicated in the photograph by the break in the bright line. Asthe make induction shock was cut off, the moment of excitation correspondsto the right-hand edge of the interruption. Figs. 1, 3, 4 are at ordinarytemperature, fig. 2 at a high temperature (25° C). Fig. 5. Same experiment as fig. 3. Leaf exhausted. Fig. 6. The same experiment. Interval between the excitations prolonged ; hencethe second phase of the response, which is usually only observed after thefirst excitation, here occurred after the second. Fig. 7. The same experiment. Mechanical, instead of electrical, excitation. Doubleeffect, due to accidental touching of two sensitive filaments one after theother. ?
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Keywords: ., bookcentury1800, bookdecade1880, bookidphiltrans019, bookyear1888
