The Journal of experimental zoology . 21 24 2 3 4 51 Group A: 7 flies ° ° ° ° ° ° ° ° ° Days ^ t) 7 8 9= 10 11 12 13 14 Group A: 7 flies 80 1 Females Temperature ° ° ° ° ° ° ° ° ° ° Hours Days Age in hours or 4 12 15 18 21 24 2 3 4 51 6 flies A 9 flies B 10 flies C Average 9
The Journal of experimental zoology . 21 24 2 3 4 51 Group A: 7 flies ° ° ° ° ° ° ° ° ° Days ^ t) 7 8 9= 10 11 12 13 14 Group A: 7 flies 80 1 Females Temperature ° ° ° ° ° ° ° ° ° ° Hours Days Age in hours or 4 12 15 18 21 24 2 3 4 51 6 flies A 9 flies B 10 flies C Average ° (for B and C females only). Days 6 7 8 9 10 11 12 13 14 6 flies A 9 flies B died Average Indicates that food was changed at this point to prevent flies from drop on the sixth day is probably accounted for by this Indicates only six flies in this group from the ninth day on. REACTIONS TO LIGHT AND GRAVITY IN DROSOPHILA 63. Age in hours Age in daysGraph 3 to fliers of different ages, as well as on the problem of time ofmaximum activity. The first of these experiments was designed to show the effectof testing flies aged 18 to 24 hours three times with an intervalof 2 hours between the tests. Seven groups of insects werethus tested, each group save three containing sixteen flies, eightmale and eight female. Groups A and B only contained sixflies of each sex, and Group E only five. The usual three trialsconstituted a test for each group, the sexes as always beingtested separately. The average of the three trials is given as theindex for the test in The following summary of theresults was obtained by averaging the indices of the seven groups(table 4). Along with this series of tests there was run a parallel seriessimilar in every respect except that the insects were 9 daysold instead of 18 hours. Only six groups were used in this case,but there were eight flie
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Keywords: ., bookauthorwi, bookcentury1900, bookdecade1910, booksubjectzoology
