46 ELECTRICITY IN AGRICULTURE 
Second experimental and control plots gave for potatoes, 
—26'5 per cent. ; peas, 9'4 per cent.; pea straw, —21'4 per 
cent. ; beans, —8.9 per cent. ; straw —0°3 per cent. 
The machine worked on an area of 100 m?. 
It is shown by this table that turnips, rape, peas, rye grass 
and clover have been improved by the watering, but not 
so sugar-beets, mangels, potatoes and strawberries, on all of 
which watering had a marked deleterious influence. Espe- 
cially was this the case with strawberries, the experimental 
plot of which had suffered much from the rain in the 
summer of 1902. 
On the unwatered control plot the harvest of strawberries 
was, to July 20th, 11°870z.; on the unwatered electrified 
plot, on the contrary, 18:250z., which shows ‘the earlier 
ripening of the fruits on the electrified plot. 
Remarks—In considering the results of these experi- 
ments it must be kept in mind that the control field had 
not been manured within the last four years, while the field 
in which were the experimental plots had not been manured 
during the last five years, or a year earlier. The experi- 
mental plots also lie about 0-3 m. lower than the control 
plots, and, therefore, may have lost more by washing during 
the rainy season of 1902 than the higher lying plots. The 
remainder of the active force of the soil, which evidently 
existed chiefly at the bottom, was therefore carried away in 
a higher degree from the experimental than from the 
control fields. The soil on these fields was mixed in the 
spring of 1903, but as this could not reach the bottom 
itself the experimental squares were in a more unfavour- 
able position than the control squares. The whole field 
should have been manured in order to produce the best 
result from the electrical treatment, but the manuring was 
omitted in order to prevent inequality in the sub-soil. 
The soil was too poor to give a high increase per cent., 
for it is the general rule that the richer the soil and the 
more luxuriant the vegetation the greater the influence of 
the electrical current upon the produce. 
