. Effects of the rays of radium on plants . Fig. 32. Experiment 43. Retardation of Germination and Growth of Timothy Grass by exposure to Air containing the Emanation of Radium. In the control culture the seeds have quite generally germinated, with plumules estimated at from i to 2 mm. long. June 5, 12 M. The seedlings in the control culture are about 5 mm. high, with the green color well developed. Growth is uniform throughout the culture. The exposed seedlings are not more than one half as tall as the control, and only very slightly green. Growth seems uniform throughout the culture. June 8,
. Effects of the rays of radium on plants . Fig. 32. Experiment 43. Retardation of Germination and Growth of Timothy Grass by exposure to Air containing the Emanation of Radium. In the control culture the seeds have quite generally germinated, with plumules estimated at from i to 2 mm. long. June 5, 12 M. The seedlings in the control culture are about 5 mm. high, with the green color well developed. Growth is uniform throughout the culture. The exposed seedlings are not more than one half as tall as the control, and only very slightly green. Growth seems uniform throughout the culture. June 8, 3 130 P. M. After seven days of exposure the radiated seedlings are still
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