8o 
Ezuart . — The Influence of Correlation 
All the leaves were now removed from the defoliated shoot except 
i and 2, which on August 30 measured : — 
Lamina. 
Petiole. Breadth. Length. 
1st leaf 3 6-3 7*1 
2nd leaf 4-5 7-8 8.2 
No increase in size had therefore occurred, since a difference of a milli- 
metre is about the limit of error in measuring the lamina by this method, 
and the shape of the leaf precludes accurate direct measurement. Never- 
theless, the removal of the lower buds in spring caused the remaining one 
to develop abnormally large leaves, as is well shown by the photograph 
reproduced in Fig. 2. 
Sr ” ' ' " i 
Fig. 1. Mode of measurement 
of leaf. 
Fig. 2. A. Largest normal terminal shoot and 
leaves. B. Smallest ditto. C. Terminal shoot and 
leaves on defoliated branch. All from the same plant 
of Tilia europaea. 
On June 10, two branches were selected 250 cms. long and 3 cms, 
thick at the base, and all the leaves and buds were removed except in the 
terminal shoot of each, whose leaves had ceased to grow. All new buds 
were continually removed, but the number was relatively few. The 
following figures give the measurements of the first branch on June 10, the 
numbers in brackets being the measurements on August 30 : — 
Petiole. 
Lamina. 
Breadth. Length. 
Internodes. 
1st leaf 
i -9 ( J ' 9 ) 
47 ( 5 -°) 
5-6 ( 5 - 5 ) 
i-o (i-o) 
1.9 (1.9) 
3'9 ( 3 ‘ 8 ) 
3'2 ( 3 ' 3 ) 
3-5 ( 3 ’ 5 ) 
2nd leaf 
2-9 (3.0) 
6-4 (6-5) 
7-0 (7-i) 
3rd leaf 
3-5 ( 3 ' 5 ) 
8-o (8-o) 
8-8 (8-8) 
4th leaf 
2-8 (3.0) 
7-4 ( 7 - 5 ) 
9'5 ( 9 - 5 ) 
5th leaf 
3 -° (3.0) 
6-o (6-i) 
7.7 (7-8) 
6th leaf 
2*0 (2*o) 
5.7 (6-x) 
7.2 (7.3) 
