VIII, C, 6 
Copeland: Growth of Lagerstroemia 
289 
on four small branches -were marked off with India ink into 
zones each 5 mm long. At the same time the curvature of the 
branch was traced by projection against a piece of paper. This 
work began about 11 o’clock and took nearly two hours. At 
intervals during the following few days the curves were traced 
again in the same manner, and the growth by zones was measured 
twice. The behavior of the twigs on the different branches 
was essentially the same, so that it would be useless to publish 
observations on them all. The accompanying cuts show the 
curves of the twigs on branch No. 2 and the growth by zones up 
to 12 noon April 14, or during the first twenty-four hours. The 
cuts are reduced one half. 
Length, 11 a. m., April 13, 5 cm. 
Marked in 5 mm zones. 
Increment, 12 noon, April 14; 
1 
2 
3 
4 
5 
6 
7 
8 
9 
Growth. 
3.6 
3.2 
3.0 
3.0 
3.2 
2.6 
2.2 
Total.. 27.8, or 61.77 per cent. 
Length, 11 a. m., April 13, 4.5 cm. 
Marked in 5 mm zones. 
Increment, 12 noon, April 14: 
Zone. Growth. 
1 4.0 
2 4.0 
3 5.0 
4 4.0 
5 3.3 
6 3.0 
7 3.6 
8 3.0 
Total.. 29.9, or 74.75 per cent. 
