Scientific American Supplement, No. 841, February 13, 1892Various
Science
Scientific American Supplement, No. 841, February 13, 1892
Various
Science -- Periodicals
Beside garden A was prepared another plot of the same dimensions,
having the same kind of soil and treated in like manner as the first,
but the electrical apparatus and wires were wanting. At the close of
the experiments only three plants had partially developed, and two of
these were nearly destroyed by mildew--one only was free from the
disease. The results, therefore, show that the healthiest and largest
plants grew in the electric plot.
In the second experiment, which we called B, twenty plants of the same
variety of lettuce and of equal size were taken. The treatment given
was the same as the plants in plot A received. Five plants only
remained unaffected with mildew; seven died from the disease when they
were half grown; the rest were quite well developed, but at the last
part of the experiment began to be affected. Several heads were large,
the largest being over the greatest number of wires and nearest the
electrodes. Examination of the roots disclosed the same phenomena as
in A.
Near plot B were also set twenty other plants, subjected to like
conditions as the first, but without electricity; all but one died
from mildew before they were half grown, the solitary plant that
survived being only partly developed at the close of the experiment,
and even this was badly affected with the disease.
Everything considered, the results were in favor of electricity. Those
plants subjected to the greatest electrical influence were hardier,
healthier, larger, had a better color, and were much less affected by
mildew than the others. Experiments were made with various grasses,
but no marked results were obtained.
The question would naturally arise whether there may not be a limit
reached where electricity would completely overcome the attack of
mildew and stimulate the plant to a healthy and vigorous condition
throughout its entire growth. From the fact that the hardiest,
healthiest, and largest heads of lettuce grew over the greatest number
of currents and nearest the electrodes, it would seem that electricity
is one of the agents employed by nature to aid in supplying the plant
with nourishment and to stimulate its growth. To what extent plants
may be submitted to electrical influence, or what strength of current
is best suited to them and what currents prove detrimental to their
development, have not been determined as yet, but it is desirable to
continue this research until some definite information shall be gained
on these points. Probably different varieties of plants differ greatly
in their capacity for enduring the action of electric currents without
injury--experiment alone must determine this.
Public-domain text, read in full here on John Shaqi.
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