1918] BAKKE—WILTING 95 
TABLE IV 
DATA FOR MARCH OF INDICES OF FOLIAR TRANSPIRING POWER FOR Helianthus PLANT 
b (MAXIMA IN BOLD FACED TYPE, MINIMA IN ITALICS) 
Ph vw Se pra INDEX OF TRANSPIRING POWER | EVAPORATION 
Lear TIME OF igi 
NUMBER OBSERVATION te U Te U Entire poiecuteene ec: 
serine Rest acne suit ace leaf i speeed 
July 21 
Teor es 18:25 ga 63 0.89 0.38 COA Oty eae: 
Le 18:25 44 73 0.55 0.33 0.44 
ae ER 19:25 40 67 0.72 0.43 0. 58~ 0.22 
Mee: 19:30 44 81 0.65 0.35 0.50 
Mss . 20:25 41 68 0.71 0.43 0.57- 0.15 
Besa ass 20:25 43 78 0.67 0.37 0.52 
fe 21:15 90 0.66 0. 32 0.49 0.16 
ee 21:20 30 105 0.74 0.28 0.51 
WE hess 22:20 52 95 0.60 0.33 0.47- 0.09 
Besa. 22:25 50 97 0.62 0.32 0.4 
Eee 23:15 47 85 0.68 0.38 0. 53~ 0.15 
Se 23:20 43 82 0.74 0.39 0.57 
eee 24:20 53 78 0.62 0.42 0.52- °.18 
| ee 24:2 40 93 0.67 0.45 0.56 
July 22 
ee st T:2 51 78 0.67 0.44 0.567 0.12 
eas 1:20 47 71 0.72 0.48 0.60 
eee 2:20 57 75 0.63 0.48 56- 0.15 
ES ay wa 2:26 50 72 o.72 0.50 ° 
a ea 3:20 46 7° 0.78 0.52 0.65~ 0.15 
Mice esse 3:20 41 7° 0.88 0.52 0.79 
Pei Ai ais 4:20 40 90 0.73 0.40 o. 57° 0.15 
Cis as 4:20 43 75 0.84 0.48 0.66 
cs 5:20 48 82 0.75 ° o.60— ere 84 
Mee es. 5:25 40 85 ©.90 0.38 0.64 
ai. 6:20 42 50 0.81 0.68 ©:75 7° &-45 
ERA TAS 6:20 46 55 0.74 0.62 0.68 
een ee 7ii5 31 37 0.74 °.62 0.68 0.15 
ee 7 36 26 42 0.89 o-5 
fee cs 8:25 25 31 0.92 0.74 0.84 0.15 
Jar ee 8:25 25 28 0.92. | /0.82 0.87 
ae 9:10 25 30 0.84 0.70 o.77 77 0.22 
Mere we 9:15 21 22 1.00 ©.95 0.98 
a 10:10 25 26 0.84 0.81 0.83 - 0.58 
My cas 10:10 23 24 0.91 0.88 0.90 
ee IT:10 19 19 1.00 1.00 eg ere 
Be ele yt TI:I6 19 19 1.00 I.00 I.00 
Meee hay I2:10 18 i 1.00 1.00 ba aan ae a ae 
ahi 12:10 18 18 1.00 1.00 1.00 
5 EN T3235 16 16 0.93 0.93 0.93- r.0 
Mee. ES 13:20 15 15 1.00 1.00 1.00 
cheese 14:15 14 15 0.71 0.67 0.69 1.2 
ei be 14:20 17 17 0.59 0.59 0.59 
Mie rig ie 15:20 15 15 0.93 0.93 0.93 1.2 
Me cae. 15:20 16 17 0.88 | 0.82 | 0.85 
A 16:25 16 18 0.94 | 0.83 0.89. 1.6 
iwc tt 16:25 17 19 °.8 9.79 0.84 
Mew ick a 6 17:10 19 18 0.95 1.00 0.98- ibe 
Mines 2) T9728 20 23 0.9¢ 0.78 0.84 : 
cae 18:10 27 30 ° 0.67 | 90.71 1.0 
Mae ene s 18:15 20. 33 0.67 0.61 oO. 
