. Eight lectures on the signs of life from their electrical aspect . Fig. 4.—"Plant-guillotine" for the demonstration of the mechanical excitability of vegetable protoplasm. The shutter, visible only on one side B, by which the twig or shoot is excited, is represented as having dropped. wires to the galvanometer. Two slips of wood (weighing 5 grams each) running in vertical grooves, are suspended by catches I cm. above the petiole close to the electrodes, which we will call A and B. I let go the slip B, which strikes the petiole near the B end with an energy of 5 , the spot f
. Eight lectures on the signs of life from their electrical aspect . Fig. 4.—"Plant-guillotine" for the demonstration of the mechanical excitability of vegetable protoplasm. The shutter, visible only on one side B, by which the twig or shoot is excited, is represented as having dropped. wires to the galvanometer. Two slips of wood (weighing 5 grams each) running in vertical grooves, are suspended by catches I cm. above the petiole close to the electrodes, which we will call A and B. I let go the slip B, which strikes the petiole near the B end with an energy of 5 , the spot flies off scale to your right. (I readjust the spot, and when it is steady, let go the slip A, and now the spot flies off to your left.) I test for direction as described above, by touching the galvanometer terminals with a bit of zinc wire, and seeing that by touching B the spot goes to right (and by touching A it goes to left). I know that when the petiole was excited at B there was current
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyo, bookyear1903
