Heat by Wounded Plants . 
6 1 
Experiment 28 . 
500 grams onion-bulbs [Allium Cepa ), from 2-3 cm. in 
diameter, in each bell-glass. In warm room two days before 
using. Washed in 1 °/ o Formalin to sterilize. Injured as in 
Experiment 27. 
Duration of Experiment. 
Temp, in 
Bell-Glass A. 
Temp, in 
Bell-Glass B. 
Difference. 
Temperature 
outside. 
July 14 
5.00 p.m. 
27-00 
27.05 
0-05 
26.40 
» 15 
8.00 a.m. 
27-00 
27.OO 
000 
26.40 
Cut onions in 
Bell-glass B in quarters 9.00 a.m. 
First clay 
10.45 a - m * 
27.00 
27.OO 
0.00 
2640 
12.45 p.m. 
27-00 
27.30 
080 
26.45 
2-45 y> 
27-00 
27.60 
060 
26-35 
> > 
4-45 » 
27-10 
27*95 
0-85 
26-40 
6-45 » 
27.10 
28-20 
1.10 
26-40 
» 
8-45 » 
27-10 
28.70 
160 
26.40 
J) 
10.45 » 
27-10 
29.IO 
2-00 
26-30 
Second day 
10.45 a * m * 
27.00 
30 -I 5 
3-15 
26.30 
>) 
n -45 „ 
27.00 
30-35 
3-35 
26-30 
12.45 p.m. 
27-00 
30-40 
3-40 
26-30 
» 
2-45 „ 
27-00 
30.40 
3-40 
26.40 
4-45 » 
27.05 
30-05 
3-00 
2 .40 
6-45 „ 
27.05 
30-05 
300 
26-40 
Third day 
8.45 a.m. 
27.10 
29-90 
2.80 
26.5O 
10.45 „ 
27.10 
29-70 
260 
26.5O 
2.45 p.m. 
27.05 
29-35 
2-30 
26-30 
6-45 „ 
27.00 
29.00 
200 
26.20 
Onions in Bell-glass B removed as in Expt. 27. 
Difference equals + temperature of Bell-glass A. 
Evening 
10 p.m. 
27.00 
26.25 
0-75 
26-20 
Next morning 
27-10 
26.50 
0-60 
26-35 
