i86 
Fraser . — Parallel Tests of Seeds by 
In Table V is shown the average results of three sets of experiments on 
another sample which gave ‘ a slightly higher ’ germination value. 
Table V. 
No. of No. of Average electrical response. Strength 
No. embryos hours and direction of shock given at head Date. Direction, 
tested. soaking. of columns. 
+ 1,000 
— 1,000 
+ 10,000 
— 10,000 
units. 
units. 
units. 
units. 
I. 
IO 
30 
0*0041 
0*0029 
0*0062 
0*0007 
April 26 
+ 
2. 
8 
30 
0*0025 
0*0023 
0*0059 
0*0009 
April 29 
some — 
3 - 
10 
27 
0*0052 
0*0032 
0*0079 
0*0010 
May 3 
some — 
Table V. — Average electrical responses of embryos of Hordeum vulgare after germinating on 
filter-paper soaked in distilled water at a temperature of 2 2°C. to 25°C. Germination value = 
9 ° %• 
These responses are noticeably higher on the whole than those in 
Table II, and the negative response only occurred in two cases in the total 
number of experiments. 
(ii) Two sets of the same sample of grains were germinated under 
different conditions at the same time, and the electrical response obtained. 
In Table VI an example of the result is given. It was found that the use 
of culture solution instead of distilled water increased the percentage 
of grains showing signs of germinating energy in a certain time. There was 
a distinct relationship between this and the average electrical response. 
Table VI. 
% germinating 
at end of 40 
hours. 
Average electrical response. 
Strength and direction 
of shock at head of columns. 
+ 1,000 
— 1,000 
+ 10,000 —10,000 
1. Culture solution 
76 
0*0016 
0*0013 
0*0046 0*0023 
2. Distilled water 
40 
o*oor 1 
0*0013 
0*0024 0*0014 
Table VI. — Average electrical responses of embryos of Hordeum vulgare germinated for 
hours on moist filter* 
■paper. Temperature =20° 
C. 
Table 
VII. 
Electrical response in volts. 
Strength and direction of shock at head of columns. 
+ 1,000 
— 1,000 
+ 10,000 
— 10,000 
units. 
units. 
units. 
units. 
1. 
+ 0*0055 
+ 0*0050 
+ 0*0125 
0 
2. 
+ 0*0041 
+ 0*0012 
+ 0*0024 
+ 0*0012 
3 * 
0 
— 0*0010 
+ 0*0055 
+ 0*0020 
4 * 
+ 0*0014 
O 
+ 0*0023 
— 0*0014 
5 - 
+ 0*0070 
+ 0*0060 
+ 0*0090 
0 
6. 
0 
0 
— 0*0012 
— 0*0017 
7 * 
+ 0*0080 
+ 0*0053 
+ 0*0112 
0 
8. 
+ 0*0013 
+ 0*0035 
+ 0*0026 
— 0*0013 
9 * 
+ 0*0070 
+ 0*0060 
+ 0*0035 
+ 0*0012 
10. 
0 
0 
+ 0*0008 
O 
Average of 10 
experiments 
+ 0*0034 
+ 0*0028 
+ 0*0051 
+ o*oooS 
Table VII.- — Electrical responses of embryos of Hordeum vulgare treated with distilled water 
tor 28 hours. Temperature — 23°C. Germination value = 85 %. 
