Evening Republican, Volume 22, Number 107, Rensselaer, Jasper County, 7 May 1919 — Red Light Aids Plants. [ARTICLE]

Red Light Aids Plants.

The attention of botanists has lately been recalled to experiments made at Jpvisy, near Paris-, by M. Flammarlon on the effect of expoiflbg the seedlings of sensitive plants to lights of different colors. Having placed four pairs of mimosa seedlings In four separate pots In a hothouse, he covered one pair with a bell of blue glass, another with a bell of green glass, a third with a bell of red glass, while the fourth was exposed to ordinary white light. At the end of two months the plants subjected to blue light were only one inch high, having hardly grown at alt Those exposed to white light wfere four inches high, that had grown In green light were five Inches high, while those whose light had been red were no less than 16 inches high. Experiments with other kinds of plants gave various results, but In every instance blue light impeded growth and development.