. Effects of the rays of radium on plants . Fig. 19. Expei-iment 27. Effect of Duration of Exposure to Radium Rays on Germination and Growth of Lupinus albus. Length of Exposures, from Left to Right, 72 Hours, 50 Hours, 26 Hours, Control. Cf. figure 20. The lengths of the hypocotyls above the surface of the soil were measured as follows : Oclob er 29, A 10 A. M. B 72 h rs. 50 hrs. 1 mm . mm 2 3 4 4-50 5 just up * 6 T mm. mm. mm. mm. Poor seed. Discarded. c 26 hrs. mm. mm.

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. Effects of the rays of radium on plants . Fig. 19. Expei-iment 27. Effect of Duration of Exposure to Radium Rays on Germination and Growth of Lupinus albus. Length of Exposures, from Left to Right, 72 Hours, 50 Hours, 26 Hours, Control. Cf. figure 20. The lengths of the hypocotyls above the surface of the soil were measured as follows : Oclob er 29, A 10 A. M. B 72 h rs. 50 hrs. 1 mm . mm 2 3 4 4-50 5 just up * 6 T mm. mm. mm. mm. Poor seed. Discarded. c 26 hrs. mm. mm. mm. D Control mm. mm. mm,

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Keywords: ., bookcentury1900, bookdecade1900, bookpublisher, booksubjectplants