260 Ward . — < 9?7 Relations between Host and Parasite 
TABLE III. 
Exp. Nos. 740, 743. Germination of ‘ seeds,’ sterilized in various ways (col. 4). 
All started in incubator at 20-2 2°C. 
Exp. 
No. 
Date. 
Seed sown. 
Treatment. 
Time. 
No. 
sown. 
No. which 
germinated. 
Approx. 
% 
740 
June 29 
B. sterilis (1) 
5% Carbolic 
5 min. 
17 
13 
80 
yy 
„ (2) 
1 7 HgCl 2 
23 
17 
74 
»> 
yy 
„ (3) 
Boiled up 
Just boiled 
24 
0 
0 
yy 
„ (4) 
Scalded 
Rapidly cooled 
21 
0 
0 
>) 
yy 
*> (O 
None 
[Control] 
24 
23 
96 
743 
July 2 
B. mollis (6) 
Sat d . HgCl 2 sol. 
5 min. 
51 
15 
30 
yy 
»i (7) 
yy 
10 min. includ- 
ing exhaustion 
35 
0 
0 
>> 
yy 
>> (8) 
yy 
30 min. ditto 
25 
0 
0 
yy 
yy 
>1 (9) 
5% Carbolic 
5 min. 
5° 
0 
0 
yy 
yy 
»> (io) 
yy 
10 min. includ- 
ing exhaustion 
3i 
0 
0 
yy 
>1 (11) 
Pure chloroform 
ditto 
4 1 
17 
4i 
>> 
yy 
», (12) 
Scalded 
Rapidly cooled 
49 
0 
0 
yy 
yy 
„ (13) 
Raised to 85° C 
yy 
58 
0 
0 
yy 
yy 
11 (14) 
11 75° C 
yy 
53 
3 
6 
yy 
yy 
1, (15) 
,1 65° C 
[Control] 
52 
50 
96 
yy 
yy 
i> (16) 
None 
35 
35 
100 
(1, 2) Simply steeped and shook up. 
(3) Brought rapidly to the boil and quickly cooled. 
(4) Plunged into boiling water and rapidly cooled. (5) Control. 
(6) Steeped and shook up. 
(7) Put under pump and forced in and washed quickly. 
(8) Put under pump, &c., and left steeping. (9) Steeped and shook up. 
(10, 11) Put under pump and forced in and washed. 
(12) Poured boiling water on and at once cooled. 
(13-15) Raised to temp, given and quickly cooled. (16) Control. 
leaves of plants, such as grasses, &c., in direct sunshine in 
the summer. 
In order to see if I could obtain any information on this 
obscure question I started a number of observations with 
thermometers. One was placed with its bulb resting among 
the leaves of a tuft of B. maximus , so arranged that it was 
clear of the soil, and well in the shade of the numerous leaves 
as the sun shone on to the tuft. 
By the side of the tuft another thermometer was laid across 
supports which held it at about the same distance from the 
soil, the bulb as free as possible in the air. 
