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Scientific American Supplement, No. 841, February 13, 1892 by Various
page 46 of 162 (28%)
This experiment was repeated with the same results. In the second
experiment the plants receiving eighty-four hours of electric light,
costing $3.50, were ready for market ten days before the plants in the
dark house. The influence of the light upon color of flowers was
variable. With tulips the colors of the lighted plants were deeper and
richer than the others, but they faded after four or five days.
Verbenas were injured in every case, being of shorter growth and
losing their flowers sooner than those in the dark house. "Scarlet,
dark red, blue and pink flowers within three feet of the light soon
turned to a grayish white." Chinese primulas seven feet from the light
were unaffected, but those four feet away were changed. Lilac colors
were bleached to pure white when the light struck them fairly. An
elaborate series of tables of the effect of the light is given in the
paper. The author believes it possible that the electric light may be
used some day to pecuniary advantage in floricultural establishments.

These experiments naturally open up many questions. Those which will
be of most importance to the practical man will be such as relate to
the benefits to be derived from the use of the electric light. That
electricity has a great effect upon vegetation can no longer be
denied. What remains now is to ascertain how to use the force with the
most economy and to the best advantage. If by its use early vegetables
will be made earlier, bright flowers be made brighter, it will be a
question of only a short time before it will come into general use. To
the student of plant physiology there are also many questions of
interest, but into these it is not the intention to enter. Prof.
Bailey's general conclusions are, in part, as follows: "There are a
few points which are clear: the electric light promotes assimilation,
it often hastens growth and maturity, it is capable of producing
natural flavors and colors in fruits, it often intensifies colors of
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