














100 Dr. H. T. Brown and Mr. F. Escombe. [Jan. 9, 
Table VIII.—First Series of Experiments on Leaves under Varying 
the Leaves and 
3 
Meteorological data. S 
5 
ao} 
g a |) See 
4 a ie | BBS e 
No. of Species of plant and general : 3 S |e el] be 5 ey | 
experiment conditions of experiment | = : B= ie! = A | 
and date. E : oe So) g 2-8 = q Aye BS | 
: 5 B18 8] se | See 
og | 2 | S| Sites) ror) eee eee 
r= > ~ ° gy Oo 2, ies} 
ap o ie) ao Ras » os nm 3 4 
oS J a ft. po eH bo gq 8 
a6 2 |seSs|) $B | a8 2 
S38) |e |S eS) be | semieee 
BR | P| © | BFA) ga | oa | #4 
oe A |] B la A | ale 
(1) (2) | 2) | @ 1G) ) ©. | Me eme. 
1 Polygonum Weyrichii— | Soa " 
June 29, Intermittent sunlight without 72 | 20°56 | 16°5 9:09 69 | 24°4 |+1-98 
1900 any screen. Duration of experi-| 
ment, 4°75 hours 
DD, Polygonum Weyrichii— | | 
June 19, Leaves exposed to full sunshine} 80 | 21°1 | 14°8 | 8°87 | 47 | 26°5 |+0°10 
1900 under thin canvas _ screen. 
Duration of experiment, 5 hours | 
IDB Polygonum Weyrichu— 
June 22, Intermittent sunlight. Leaves} 56 | 18°3 | 12°7 8°18) 51 | 25°7 |+0°05 
1900 under thin canvas _ screen. 
Duration of experiment, 4°2 
hours 
1 fe Polygonum Weyrichtii— 
July 3, Intermittent sunshine with some| 42 | 16°8 | 13°8| 9°98; 70 | 10°6 |+0°44 
1900 showers. Leaves under canvas 
screen. Duration of experi- 
ment, 4°3 hours 
Vi: Polygonum Weyrichii— 
July 11, A hot cloudless day. Leaves} 100 | 27°2 | 19°6 | 12°33 | 44 | 26°56 | +0°15 
1900 exposed under canvas screen. 
Duration of experiment, 4°9 
hours 
VI. Tropeolum majus— : 
Sept. 4, Diffused light with very little} 3°3 | 17°0 | 12°7| 8-58] 60 9:1 |+0°58 
1900 sunshine. Leaves exposed 
under canvas screen. Dura- 
tion of experiment, 3°3 hours 
VII. Tropoeolum majus— 
Sept. 7, Leaves in sunlight under canvas| 55 | 20°1 | 14°7| 9°49 | 58 5°4 |+1°27 
1900 screen. Duration of experi- 
ment, 5 hours 

