REACTIONS TO LIGHT AND GRAVITY 
TABLE 2—Continued. 
IN DROSOPHILA 61 
Females 
Temperature..... 222 20° Pim PE p> 24.0° 24.1° PBL 2 24.0° Donde 21.0° 
Hours Days 
Age in hours or 
Cb apoaneead 12 15 18 a1 24 2 3 4 5 
Groups 
AS: 9225) 1169-0, | GOON 765: | 8410) |F84209| 75.5) | 7625") 70-5, | 72.0 
13 a ee OSORIO oe eaaaO) ede | SOLOS STeOrleSacOn |e SonOn|| Oo) 1655 
Ce CE I 0) |) CAO 7eha5s Oro I 0) || SoG |) aly || Why |) Lolo) 
Average...... 94.0 | 73.8 | 79.1 | 76.8 | 90.5 | 87.6 | 81.6 | 80.3 | 74.1 | 69.6 
Temperature............. 21.6° oroe 24.6° 22.8° PANS 22-20% 20.0° 23.0° 24.0° 
Days 
Avevin dave: ss.40s5.n oe 6 7 8 9 10 ll 12 13 14 
Groups 
AV eee LA tan ae GoLONPOSeon | oGron | Ole On|PoseOl|| soco) |Rooeon |e 44n0n ea 3n0 
DESPRE srs y cle Hoon 4s OMe O) |PoSe oe (od Onl ooron lea (non losron lowe O 
(Ces eee eee or GosON 4 oco 450) | 32-5) (R2Osonlom_ OnlmlSaor 2oeOne29eo 
PAVETARE. 28) f5 2. ok S G18 1) GEO) 29.01) ZG) |! SB3LIL 4) SHG |) ABSky |) aio |) alot) 
Showing change in phototropism of wild flies when fed daily with fresh food 
Per cent of phototropism 
Hours ° 9 /827 3645 
Days d a 3 
Tem pereture dt each 
test also indicated, 
é 7 8 q 
Age of flies 
Graph 2 
