REACTIONS TO LIGHT AND GRAVITY 
Indices... 
Tests..... 
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Restsins-. . 
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Mestssanae 
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TABLE 1 
Average indices of male flies 4 to 6 days old 
2 3 4 5 6 G 
Sizd | 93-2) ~ GIO GGRSa9Sa0 9429 
12 13 14 15 16 17 
9525) 9223) SORi OIE A 19322) 9056 
22 23 24 25 26 27 
88.3 88.8 82.4 84.8 85.5 84.7 
32 33 34 30 36 37 
1 
91.5 
Average indices of female flies 4 to 6 days old 
2 3 4 5 6 ¥ 
9707 95:8 94:9 95.4 94-1 ‘9622 
12 13 14 15 16 17 
92220 491.0 90.0 92238" 90.5 S428 
22 23 24 25 26 27 
84.7 89:2 86:5 91.0 87.0 85.2 
32 33 34 35 36 37 
74.5. 84.3 79.8 74.5 75.8 84.1 
42 42 4H 45 46 47 
TG! CIES 70:90 TICLT 68063 Soe. 
Average of male flies 16 to 18 hours old 
2 3 Ato <5 6 a 
Woe 18.1) 2 SOF) “SOL5y 176.8 B1Ge2 
12 13 14 15 16 ive 
ete ei Gt il 2) GOs 4 al 2h (6652 
22 23 24 25 26 27 
61.8 58.7 57.4 56.2 52.4 56.8 
32 33 34 30 36 37 
46.8 
Average of female flies 17 to 19 hours old 
2 3 4 5 6 7 
90.6 89.9 85.5 82.4 87.4 88.7 
8 
94.9 
18 
88.8 
85.6 
IN DROSOPHILA 
83.1 
57 
94.0 
88.8 
84.3 
87.4 
