IOWA ACADEMY OF SCIENCE 
31 
PERCENTAGE OP GERMINATION AFTER TREATMENT. 
Germina- 
tion in 
24 Hours 
Germina- 
tion in 
48 Hours 
Germina- 
tion in 
72 Hours 
Final 
CJiecIc — • 
Purple, ’06 
I 
! 3 
14 
' 15 
Yellow, ’06 
0 
3 
11 
12 
Purple, ’09 
• 14 
1 23 
30 
30 
Yellow, ’09 
: 3 
46 
43 
: 48 
Hot Water — 
Purple, ’06 
0 
I 0 
0 
1 1 
Yellow, ’06 
0 
! 0 
0 
' 0 
Purple, ’09 
0 
0 
1 
1 
Yellow, ’09 
0 
1 
2 
2 
Sulphuric acid — 
Purple, ’06 
0 
1 
4 
6 
Yellow, ’06 
1 ^ 
2 
7 
10 
Purple, ’09 
1 4 
37 
42 i 
42 
Yellow, ’09 
! 4 
17 
18 1 
19 
Sulphuric acid, 2 min. — 
Purple, ’09 
2 
5 
10 1 
12 
Scratched — i 
i 
1 
1 
Purple, ’06 
0 i 
5 
11 i 
14 
Yellow, ’06 
1 ! 
3 
9 1 
9 
Ho. 82— 
1 
! 
Purple, ’09 1 
25 
33 ! 
42 
42 
Yellow, ’09 ! 
5 
35 
36 
36 
Ho. 70— 
Purple, ’09 
21 
30 
35 
35 
Yellow, ’09 
33 
35 
39 
40 
Ho. 11— \ 
Yellow, ’09 : 
1 
29 
30 
41 
41 
Undoubtedly the hard clover seeds as well as the hard seeds of other 
plants are for the purpose of tiding the seed over unfavorable condi- 
tions. It has been well said by Mr. Ewart, ‘'Macrobiotic seeds are all 
seeds which show no especial adaptation for dispersal. None are wind 
or water borne and although some are more or less accidentally dis- 
tributed by animals, adhesive seeds or fruits are conspicuously absent 
among them. They are, in fact, distributed in time instead of in space. 
Falling to the ground beneath or close to the parent plant, a few are 
immediately germinable but others only after long periods of years or 
after special actions have been brought to bear upon them. ’ ’ 
The ease is, however, very different with many seeds that are found 
in low damp situations like the willow and the cottonwood and the soft 
