483 
the Fruit of Cucurbita. 
If this series of readings is graphically represented it will 
be found that the fall and rise in the rate of growth is so 
nearly uniform that it is impossible to distinguish night from 
day. 
Observations on the gourd V7 were continued by my friend 
Mr. Tansley of Trinity College, to whom I am much indebted 
for a series of careful records. With regard to the comparison 
of night and day, Mr. Tansley made a few observations be- 
tween July 23 and 2 6, which show a clear increase of growth 
in the night. 
Growth. 
Time. 
Rate. 
mm. 
o-oi mm. per hour. 
July 
23. 
10 a.m. to 10 p.m. 
1.960 
1 2 hours 
16-3 
23-24. 
to p.m. to 10 a.m. 
2.950 
12 „ 
24.6 
„ 
24. 
10 a.m. to 10 p.m. 
1. 140 
12 „ 
9-5 
„ 
25. 
6.40 a.m. to 9 p.m. 
1-235 
14-3 
8-6 
„ 
25-26. 
9 p.m. to 6.40 a.m. 
1-565 
9-7 .. 
16.1 
” 
26. 
7.40 a.m. to 8 p.m. 
1-035 
12.3 „ 
8.4 
The results are interesting in comparison with mine of July 
12-15, because at that time the gourd was constantly increasing 
in diameter, whereas at the end of July it showed the daily 
shrinking, which has been previously noted in V2 and other 
fruits. Thus on July 27 the fruit shrunk between 2.30 and 
5 in the afternoon ; and on 28th between 3.36 and 4.35. On 
August 2 the shrinkage was so great throughout the day that 
at 7 p.m. it was smaller by 0-21 mm. than it had been at 7 a.m. 
Between 7 p.m. and 7.13 a.m. on August 3 it increased 
0-420. 
The following figures of Mr. Tansley ’s show the effect of 
syringing the leaves and soil ; we get the same rapid disturb- 
ance accompanying a general temporary increase in rate that 
is shown in Exp. 18. 
