296 



Sir F. Darwin. 



cent 



Experiment 32.— July 7, 1913. Ivy. 



11 a.m. — Shoot cut, 10 leaves (current year) vaselined. 

 July 8, 9.55 A.M. — In potometer at east window. \}r during day 54-64 per 

 T 15-2-17-1 C. 



Time. 



E. 



Average. 



Time. 



E. 



Average. 



10.5 A.M. 



21 -5 







11.2 A.M. 



115 





10.9 „ 



20 -7 







11.18 „ 



111 -o 





10.11 „ 



Cut up leaves, 



4 cuts per 



11.25 „ 



118 







leaf. 





11.31 „ 



120 -0 "1 



119 



10.13 „ 



85 -5 







11.35 „ 



118-0 J 



10.17 „ 



100-0 







11.35 „ 



Eeplaced at east window. 



10.24 „ 



109 -0 







11.46 „ 



133 





10.32 „ 



125 -0 







11.52 „ 



133 -0 





10.39 „ 



127 -0 







12.2 p.m. 



138 





10.47 „ 



125 -0 \ 





129 



12.12 „ 



140 -0 





10.49 „ 



132 -0 f 





12.19 „ 



140 -0 I 



139 



10.50 „ 



Placed iu dark 



room. 



12.24 „ 



138 -0 J 



Eesult 

 or 



L. 



129 



108 



D. 

 119 

 100 



L. 



139 



117 



Average : L/D = 113/100. 



Experiment 33.— July 9, 1913. Ivy. 



10 a.m. — Shoot having 13 leaves of current year, cut and vaselined. 

 July 10. — In potometer at east window, during day 65-73 per cent. 

 T 16-7-19-2° C. 



Time. 



E. 



Average. 



Time. 



E. 



Average. 



10.11 A.M. 



Cut up 

 leaf. 



10.17 „ 



96 



10.26 „ 



110 



10.38 „ 



130 



10.47 „ 



147 



10.51 „ 



143 



10.57 „ 



135 



10.59 „ 



145 



11.0 „ 



Placed in 



11.11 „ 



112 



11.49 „ 



123 



4 cuts each 



140 



sr. 



11.51 A.M 



11.56 

 11.57 

 12.4 

 12.9 

 12.16 

 12.22 

 12.27 

 12.32 

 12.35 

 12.38 

 12.39 



I 



121 



120 1 



121 J | 

 Eeplaced at east window. 



150 

 154 

 157 

 152 

 154 

 151 

 159 



149 \\ 

 157 fl 



153 



Eesult 

 or 



L. 



140 



116 



D. 

 121 

 100 



L. 

 153 

 126 



Average : L/D = 121/100. 



