GIANT BAMBOOS. 
241 
evening was dull and showery, and in the latter case there 
was a marked increase in the rate of growth some time before 
darkness set in. From 7-10.30 A.M. on the 23rd the sun 
shone brightly right on to the culms under observation, 
which were on the east side of the clump ; and from 8.30 
to 9.30 no growth could be detected for either culm. 
The curves of growth of the two separate culms agree 
somewhat closely, and if some allowance is made for the 
B individuality ” of the two, the agreement between them 
and of both with the external condition is remarkably close. 
A similar series of measurements of the same two culms 
was taken hourly from 5.30 A.M. on June 29 to 5.30 P.M. 
on June 30. The result is shown in Table XIV. and the 
curves of growth in fig. 4, PL XXI. 
Table XIV. 
