. Ameboid movement. Amoeboid movement; Amoeba. 2 Z9i ? Figure 34. The path of an Amoeba discoides under light controlled conditions. At 2:42J4 the light was turned ofif until 2:52, except for a ten-second flash at 2:47. The smoothness of the wavy path was thus maintained in complete darkness. Length of the ameba, about 400 microns. ^ ^cs^^^.. Figure 35. Path of an Amoeba discoides showing that continuous light is unnecessary for the maintenance of a wavy path. The ameba moved under light controlled conditions from 3:02% to 3:13^. From then until 3:43 the light was turned off except for lo-seco
. Ameboid movement. Amoeboid movement; Amoeba. 2 Z9i ? Figure 34. The path of an Amoeba discoides under light controlled conditions. At 2:42J4 the light was turned ofif until 2:52, except for a ten-second flash at 2:47. The smoothness of the wavy path was thus maintained in complete darkness. Length of the ameba, about 400 microns. ^ ^cs^^^.. Figure 35. Path of an Amoeba discoides showing that continuous light is unnecessary for the maintenance of a wavy path. The ameba moved under light controlled conditions from 3:02% to 3:13^. From then until 3:43 the light was turned off except for lo-second flashes at 3:18, 3:22j^, 3:24, and so on. The ameba had probably come to rest for some reason between 3:24 and 3 130^, for an unexpectedly small amount of space was covered in that time. In spite of this disturbance, however, the evidence indicates that light is without causal effect in the wavy path of the ameba. Length of the ameba, 450 microns. darkness the ameba merely kept on in the direction it was going when the light was turned off. But during the second period of darkness the ameba changed its course in such a way as to make a smooth curve. In the third period of darkness the ameba con- tinued on its course completing the wave. It is thus apparent that continuous light is not necessary to the formation of waves nor is it detrimental to their formation. Figure 35 shows essen- tially the same thing as Figure 34. The light was turned on from 3:30j^ to 3:32. During this time the behavior of the ameba was irregular, but whether this was caused by the light or not, cannot be stated. At 3:43 the ameba came into contact with a small particle which changed its course. The slow speed of movement of these two amebas was due to the low temperature (20° C), the experiments being performed in January. The. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations m
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Keywords: ., bookcentury1900, bookdecade1920, bookpublisherprinc, bookyear1920
