Notes . 
287 
Series I. 
A. 
B. 
(9 a.m.) 
(4 P- m -) 
per cent. 
per cent. 
Starch . 
3' 2 4 
4-22 
Sugars — 
Cane-sugar 
4-94 
8-02 
Dextrose . 
o-8i 
0-00 
Levulose . 
4-78 
i-57 
Maltose , 
. . I '2 I 
3*62 
Total sugars per cent. 11-74 
13* 21 
We have already seen 
that when leaves are 
plucked and placed 
exposed to sunlight with their stalks in water there is a large increase 
in weight of a given area of the leaf-lamina, owing to the accumulation 
of the products of assimilation. The following results show the 
varying proportions of starch and the different 
sugars under these 
conditions : — 
A. Leaves plucked at 5 
a.m. 
B. Leaves plucked at 
5 a.m. and insolated apart from the plant 
until 5 p.m. 
Series II. 
A. 
B. 
per cent. 
per cent. 
Starch . 
1-23 
3-9i 
Sugars — 
Cane-sugar 
4-65 
8.85 
Dextrose 
0-97 
1-20 
Levulose 
2-99 
6.44 
Maltose 
1-18 
0-69 
Total sugars per cent. 9-69 
I 7 -I 8 
We have also investigated the changes which 
go on in the carbo- 
hydrates when leaves are 
: plucked and placed 
in the dark. The 
following is an example of such an experiment 
A. Leaves plucked at 3 p.m. 
B. Leaves plucked at 3 p.m. and placed in the dark for 24 hours. 
Series III 
A. 
B. 
per cent. 
per cent. 
Starch 
3*6.93 
2-980 
