POWER OF VITAL FORCE IN GERMINATING SEEDS. 43 
6.00 " ■ 1080 
7.40 " 1141 
9-00 '' 1175 
10.00 " 1193 
10.45 • " ........... 1195 
6.45 A. M. next day it had risen to 1227 
8.00 " it had risen to 1300 
At this point the platform of the scales broke down, and so put an end to 
that trial. It will be seen that during the first quarter hour the pressure increased 
at the rate of five pounds per minute. From eight to nine o'clock, the record 
was made every five minutes, and it was found that the increase varied from five 
pounds down to one and four-tenths pounds per minute. Later in the day there 
were times when the movement nearly ceased, as during the forty-five minutes 
after ten o'clock, p. m. , only two pounds were gained. The cause of these vari- 
ations was chiefly, if not wholly, the changes of temperature. 
The next experiment in this list was made with three pints of beans. This 
trial was commenced Monday, February 5th. When observed 
At 8.00 A. M. the pressure was 55 lbs. 
9-00 " • 375 
10.00 " 620 
11.00 " 875 
12.00 " 1165 
1. 00 p. M. " 1275 
2.10 " 1351 
3.00 " I4IO 
4-00 '* 1475 
5-00 " 1515 
10.00 " 1670 
Tuesday : 
At 7.45 A. M. the pressure was 1845 lbs. 
8.00 " i860 
9-05 " 1925 
10.00 <■<■ _ _ i960 
11-15 " 2025 
The rate of increase of pressure varied much more in this trial than in that 
with peas. During five minutes of the hour between eight and nine o'clock, a. 
M., on Monday, the increase was eight pounds per minute, while a period of twenty 
minutes, between twelve and one, p. M., the same day, showed only nine pounds 
Increase, or less than half a pound per minute. 
The relative rate of increase of the pressure of the swelling beans was much 
more rapid than that of the peas, for while the peas, with fully as close attention, 
attained to a pressure of but six hundred and eighty-seven pounds at noon of 
