The Heliotropism of Hydra. 423 
1891.] 
TABLE 1,—//ydra fusca. 
AREAS . ca 3 Mla ees E fice ni. IV. Y VE. VIL ViN IX 
jason OF THE Torns 6 4 es ee ke O a B2 R2 G2 
Date. Hour, Weather. Temperature, F. 
March 9, 10.30 A.M. Bright. 11 17 19 18 9 27 11 25 16 
“ 9, 12.30 P.M. s 10 15 18 19 19 17 24 16 22 
“ 10, 10.30 A.M. Cloudy. 67° 14 8 21 22 23 10 27 9 33 
“10, 4.30 P.M. si 75° 15 7o a 35 4 7 230 72 y 
"o 11, 9.30 A.M. “ 14 4 23 30 27 9 25 9 32 
* 12, 10.30 A.M. Bright. 74° 21 11 15 34 29 14 28 $ 35 
“ 13, 10.30 A.M. Cloudy. 26 6 21 41 20 13 33 43 
“o ih 1230 P. “a 72° 33 8 25 30 31 7 30 5 46 > 
REARRANGEMENT OF THE COLORS . > o a ayo +++ S B4 B2 Bı 
Date. Hour, Weather. Temperature, F. 
March 15, 9.30 A.M. Cloudy. 70° 21 16 22 21 21 27 18 25 26 
u” 56, 3.30PM. Bright. 70° 15 27 15 26 20 30 II 33 26 
‘+ 7642890 A i 62° 17 23 18 22 23 38 15 41 25 
“ 417, 10.30 A.M. a 70° 21 25 23 17 27 41 20 47 21 ' 
« 18, 11.30 A.M. n 68° 13 36 20 22 15 43 14 50 18 
« . 38 §.00 PM a 68° 13 39 10 2I 18 45 14 52 21 
REARRANGEMENT. OF THE COLORS . p >. sere eb ee as we A G2 R 
Date, Hour. Weather, Temperature, F. 
March 19, Noon. Cloudy. 66° 29 7 34 17 39 24 42 
“o 19, 3-45 P.M as 35 6 3 26 ak A ee f 
“ 20, 10,.00A.M. Bright. gar 36 10 31 19 33 27 53 
“  90,° 3.45 P.M. 39 II 35 14 42 21 63 
“ 21, 9.45 AM. Foggy. 70° 33 10 4! 13 38 40. Ó% 
egal! GOO PAL X 66° 35 8 48 17 52 18 64 
“ 23, 10,00 A.M. Cloudy. pate 34 14 33 25 35 24 58 
