Experiment 13 — Greenhouse. 



.2eSq 

 1i =0 ,- 

 •- S ■ D- 2 



a Kirtrn 2 

 m XI "^ J3 



S u O l^ Vh 



>>4; p, o. 



.06 

 .06 

 .06 

 .06 

 .17 

 .17 

 .18 

 .41 

 .77 

 1.00 

 1.16 

 1.33 

 1.16 

 .66 

 .50 

 .46 

 .26 

 .16 

 .14 

 .14 

 .14 

 .14 

 .14 

 .06 





.12 

 .12 

 .12 

 .23 

 .20 

 .29 

 .40 

 .52 

 1.00 

 ,53 

 1.38 

 1.38 

 1.22 

 .81 

 .71 

 .38 

 .15 

 .15 

 .15 

 .15 

 .15 

 .15 

 .15 

 .12 



a 6 



a <u ° 





.13 

 .13 

 .16 

 .16 

 .11 

 .20 

 .36 

 .60 

 .69 

 .77 

 .42 

 03 

 .88 

 .86 

 .56 

 .38 

 .30 

 .26 

 .26 

 .26 

 .26 

 .26 

 .26 

 .13 





>s 



3.2 



5.6 



'4'7 



> I > 



Pi 



.5 

 .5 

 .5 



.5 

 .8 

 .5 

 .4 



.7 



.6 



.9 



.9 



.8 



.7 



1.2 



1.7 



1.0 



.9 



.9 



.9 



.9 



.9 



.5 



7 r? 

 > I > 





.4 

 .4 

 .3 



.3 



1.5 



.8 



.5 



.6 



1.1 



1.4 



.2 

 .3 

 .7 

 .8 

 .2 

 .8 

 .6 

 .5 

 .5 

 .5 

 .5 

 .5 

 .4 



Note: Verbascum No. 1. normal. 



Verbascum No. 2, hairs removed from upper leaf surfaces. 

 Verbascum No. 3, hairs removed from lower leaf surfaces. 



Experiment 14 — Darkroom. 



Note: Verbascum No. 1. normal. 



Verbascum No. 2, hairs removed from upper leaf surfaces. 

 Verbascum No. 3, hairs removed from lower leaf surfaces. 



82 



