. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. RELATIVE PHOTOTROPISM. 357 by shaking. The end of the tube was stopped by a cork covered with black paper, and the tube was placed in position. Ten successive trials were given in each test, the time of movement through the distance of 172 mm. being taken by a stop watch. If "the passage was not accomplished within 30 seconds, a trial was considered completed, and 30 seconds was recorded as the. 13 14 16 18 Time in Seconds. ao aa 28 30 GRAPH II. The solid line shows the record of 100 wild flies, 50 males and 50 females,
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. RELATIVE PHOTOTROPISM. 357 by shaking. The end of the tube was stopped by a cork covered with black paper, and the tube was placed in position. Ten successive trials were given in each test, the time of movement through the distance of 172 mm. being taken by a stop watch. If "the passage was not accomplished within 30 seconds, a trial was considered completed, and 30 seconds was recorded as the. 13 14 16 18 Time in Seconds. ao aa 28 30 GRAPH II. The solid line shows the record of 100 wild flies, 50 males and 50 females, in a lined vertical tube. The broken line shows the record of 100 vestigial flies, 50 males and 50 females, also in a lined vertical tube. In each case the time is plotted against the number of insects. time made. After each trial the animal was immediately re- turned to the starting point, if possible by its light or gravity reaction, but frequently by shaking. The latter procedure was made necessary in order that an approximately uniform period .(about half a minute) might elapse between each trial. In this manner each of the five flies of a given type was tested in imme- diate succession, the same tube (either the one lined by paper or the one unlined) being used in the same position (either vertical or horizontal) for each insect. When the test of one group of flies was thus completed, the vials containing the insects were. 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 may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
