the Fntit of Cuctirbita. 473 
perceptible in the longitudinal direction, the fruit V 5 was on 
Sept. 1 5 suspended to an iron stand so that its longitudinal 
axis was vertical ; a vertical needle was hung to its lower end, 
by which readings could be taken with a cup of oil moved 
vertically by the micrometer screw. 
EXPERIMENT XII.— Sept. 16. V 5 . 
Time. 
Reading. 
Rate. 
Temp. C°. 
mm. 
/ j , per min. 
10.1 a.m. 
8*495 
20-2 
Sun and cloud ; mats on 
.15 „ 
.522 
-1.9 
21.0 
at 10.6. 
•33 „ 
•590 
-2.9 
21-3 
Sun. 
1.0 p.m. 
•690 
-07 
20 
Cloud. 
.40 „ 
• 57 ° 
+ 3-0 
18.5 
Cloud and occasional 
2.4 » 
•538 
+ i -3 
rain. 
•43 » 
.520 
+ 0-5 
20-8 
Sun and cloud. 
Plant disturbed. 
3-52 „ 
.580 
New zero. 
22.3 
4.16 „ 
•56° 
+ 0.8 
21-0 
Cloud (4 hr. 8 m.) 
•32 ,, 
.520 
+ 2.5 
Oblique sun. 
5 -° » 
• 5 °° 
+ 0.7 
19-5 
Shade. 
.24 „ 
•460 
+ 1-6 
17.8 
•45 » 
•430 
+ 1.4 
i 6-5 
6.0 „ 
•410 
+1 ’ 3 
1 
It will be seen (Exp. 12) that the fruit shrunk in the 
morning with sunshine, and elongated at 1.40 with cloud and 
rain. The rate diminishes at 2.43 with sunshine, rises at 4.32 
after the clouds at 4.8, and falls also after the sun at 5.0 ; 
finally rises in the evening. 
The next experiments were made on the fruit V2, which had 
been used for the weighing experiments. The growth had 
practically ceased, as shown in Table B, p. 474. The second 
column gives the readings of the micrometer, the third and 
fourth columns give gain and loss in size. 
Exp. 13 being the first in which readings of the wet-bulb 
thermometer were taken, I have given the notes in full. In 
most other cases I have only given the readings (chosen as 
dividing the time equally) from which the published rates are 
calculated. The column headed ‘ Psychr.’ gives the relative 
humidity of the air taken from Jelinek’s tables. 
