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CO 
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in 
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7- NO 
6 cb 
Area in square mm. of the cross-sections of the two cotyledonary petioles, the hypocotyl and the root, also of the 
xylem, the phloem, and the xylem and phloem taken at different levels, A, B, and C, corresponding to Diagrams 
i and 2 . 
U 
CD 
> 
<D 
-1 
C.S. of 
xylem 
and 
phloem. 
Os ON 
w T- 
6 d 
M O 
COOO 
6 6 
NO O 
l-H O 
6 M 
On O 
d ON 
6 ^3* 
t ^ lO 
IO M 
6 4- 
O NO 
1^. I '. 
6 »b 
C. S. of 
phloem. 
tO !>. 
too 
6 M 
cm i>. 
cm VO 
6 6 
m 
° T 
6 6 
t". >-i 
7 no 
6 CO 
NO M 
CO NO 
6 ci 
^ O 
ir.co 
6 4- 
C. S. of 
xylem. 
Th d 
d — 
6 A 
ON CO 
o ~ 
6 6 
ON On 
O T, 
6 6 
d ON 
l-H d 
6 w 
•- ^ 
d >r. 
6 « 
LT.NO 
d ON 
6 6 
C. S. of 
root. 
LQ — 
Ifj On 
o d 
m so 
C5 Tj- 
ir.oo 
O^NO 
rO to 
00 vo 
to 
00 NO 
00 ON 
CO b 
« ON 
NO NO 
OO CO 
NO tC 
co tF" 
CO 
LO ON 
On d 
d >n 
rt O 
Level B. 
C. S. of 
xylem 
and 
phloem. 
d O 
vo 2* 
6 d 
O co 
^oo 
6 « 
d 
d o 
6 d 
00 
CO 
6 
On 
NO I 
6 4- 
H4 Th 
vo rp 
6 tr; 
C. S. of 
phloem. 
00 SO 
t(- rf- 
6 M 
t)- r^. 
co o 
6 g 
irj uo 
6 « 
CO ON 
d d 
6 CO 
On On 
CO d 
6 tb 
00 tr. 
T - ON 
6 A 3 
C. S. of 
xylem. 
’t *4- 
— Os 
6 6 
SO so 
o ^ 
6 6 
cq i>. 
H. 00 
6 6 
lO oo 
6 IH 
to o 
eq to 
6 
rr m os 
^ rc 
b m 
C. S. of 
hypocotyl. 
ON O 
oc >o 
eb on 
- O 
to VO 
rh 1 ^. 
Hi !>. 
W to 
too 
CO cO 
^ O 
^ it 
d o 
Ao NO 
d 00 
i - Th 
ir.NO 
CC lb 
•^* ON 
CO 
lono 
On iO 
4- >-i 
sr. tJ- 
Level A. 
C.S. of 
xylem 
and 
phloem. 
i>. in 
• r. ^ 
6 d 
oo Th 
7 'O 
6 ci 
t'- co 
-1 o 
6 d 
d co 
CO oo 
6 cb 
IQ M 
i+- I '. 
6 no 
CO O 
7 - O 
6 Ao 
C.S. of 
phloem. 
00 00 
COOO 
6 M 
CO Cl 
G oo 
6 M 
co d 
— il- 
6 M 
ON ON 
I- x^. 
6 d 
d -Ij- 
CONO 
6 cb 
CM CM 
CO cO 
6 ^ 
C.S. of 
xylem. 
On t- 
M 00 
6 6 
ir; d 
O 00 
6 6 
't- l-l 
O NO 
6 6 
CO 
7 o 
6 M 
CO t'- 
►H O 
6 Ao 
1 - 00 
Cl NO 
b 6 
C. S. of 
cot. petiole. 
ir.vo 
ir. i_ 
M IQ 
- OO 
•• 
ON CO 
ir. to 
»o 
Hi 
oo ON 
oo -r 
Cl ON 
l-l d 
d 
7 «o 
NO to 
d 
co r>. 
T f 5 
00 NO 
CO '3" 
4" 
00 g 
On 6 
no rh 
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Relative 
size. 
(See 
Fig. i.) 
small 
large 
small 
large 
small 
large 
small 
large 
small 
large 
small 
large 
Seedling. 
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