Artificial light for plant growth

Slowed-up moving pictures just taken by Carl Wallen and R. S. Green, New York motion picture camera men, of a number of different plants grown under electric light by the Westinghouse Lamp Company, in co-operation with Peter Henderson & Son, seedsmen in their greenhouses in Jersey City, N. J., prove conclusively that through the use of artificial light plants can be forced or retarded to conform to a predetermined schedule. The motion pictures were taken for the purpose of registering the exact degree of acceleration in the growth of the plants when forced by artificial light, and to determine at which stage of the plant´s blossoming the light has the maximum effect. The pictures show that the blooming was greatly speeded up, some flowers, such as tulips, for instance, coming from tight buds to full bloom in less than an hour.