Effects of the rays of Effects of the rays of radium on plants . effectsofraysofr1908gage Year: 1908 no EFFECTS OF EXPOSING SEEDS soaked seeds were exposed for 15 hrs. (1,500,000 x), was followed by a recovery and apparent acceleration of growth, for the plants from exposed seeds, within ten days after planting, had caught up with and even slightly surpassed the control plants in height. The effect of this exposure of the white mustard was slight, and in har- mony with results obtained by Koernicke,* who found Brassica nafiis especially resistant. He reported that swollen seeds were accelerat
Effects of the rays of Effects of the rays of radium on plants . effectsofraysofr1908gage Year: 1908 no EFFECTS OF EXPOSING SEEDS soaked seeds were exposed for 15 hrs. (1,500,000 x), was followed by a recovery and apparent acceleration of growth, for the plants from exposed seeds, within ten days after planting, had caught up with and even slightly surpassed the control plants in height. The effect of this exposure of the white mustard was slight, and in har- mony with results obtained by Koernicke,* who found Brassica nafiis especially resistant. He reported that swollen seeds were accelerated in growth by exposure to 10 mg. of radium bromide, but does not state the activity of the preparation he used. When seeds of Ltcpinus albus were first soaked in water, and then 12 0. 11 12 Day of month Fig. 10. Effect on the Growth of Zea Mays of Exposing the Grains, before Plant- ing, for 16 Hours, to Raj'S from Radium of Different Degrees of Activity. exposed while germinating for 18 hrs. (10,000 x ), and planted in soil, the tap-roots grew very abnormally. After 16 days' growth in the soil the tap-roots had evidently ceased growing, and, correlated with this fact, the secondary roots had developed more vigorously than normally. Oat grains were exposed for 67 hrs. after being soaked in water, and then planted in soil. The subsequent growth of the shoots was ♦Bibliography, p. 72, No. 39.
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