102 Dr. H. T. Brown and Mr, F. Escombe. [Jan. 9, 






Table VITI— 
5 
Meteorological data. 2 
_— 
o 
2 
r: ga | iC x 
s ise 7 £ 
5 i a |e Ss z 
No. of . 5 2 + 2 a © 
Pe aan Species of plant and general a a 27 es El a 
Nahe conditions of experiment. = = ~ 2 | eu ees Bes 
and date. eH g g |e-Be | -g gs2]| 29 
3 SI e | gee) 2.4 | eS 4 
a o | | 5s as 4 
a oS ne) a © & Oy = ro GH © ° los 
of & 2 =) Sa ee a 8 fe, 
SS aS = = eh @) Ey Po a6 
=i) = aS) <a 25 | 2 5-4 -2ee x 
$3 | ~-| 2 | Bae) eS | cae 
Ef Ps © |r a| Sn | See ss 
ey a | & a A «| Saas 
(1) (2) (3) | @ | ®@ | © | M) SG iae 
VIII. =| Lropeolum majus— | D i al | ‘ 
Sept.11, | Leaves in sunlight under canvas} 95 | 17°6 | 12°2| 7°78 55 | 21°8 +0-49 


1900 | sereen. Duration of experi- 
ment, 4°8 hours 
EX | Petasites albus— 
June 6, | Leaves in sunlight under canvas} 97 | 21°1 | 14°4 | 8°74 46 | 12:2 +0°96 
1900 '  sereen. Duration of experi- | 
ment, 3°2 hours 

| 
| 
Xe | Petasites albus— | 
June 26, | Leaves in weak diffused sunlight; 16  15°5 | 11°9| 8°44 64 | 25°4 |+0°07 
1900 | under canvas screen. Dura- 
| tion of experiment, 5:3 hours 
D.C Petasites albus— 
July 5, Leaf in full sunlight for 4/10 of | 45 | 19°5 | 16°6 | 12°11) 71 | 16-0 |+0°54 
1900 | time; afterwards under canvas | 

| sereen. Duration of experi- 
' ment, 5°2 hours 
pu | Helianthus annuus— 
Aug.7, | Leaf still attached to plant for; 50 | 16°9| 18:2 | 9°21) 65 | 25-7 |+0:°28 
1900 assimilation experiment. No 

screen used. Duration of experi- 
ment, 5 hours 

Full solar radiation without any| 87 | 19°4 | 14:2) 9°24) 54° 7°4 41°54. 
screen. Detached leaves. Dura- | | 
| 
XITI. | Helianthus annuus— 
| 
tion of experiment, 3°7 hours | 









N.B.—In the case of experiments marked thus * the 
