Effects of the rays of Effects of the rays of radium on plants . effectsofraysofr1908gage Year: 1908 142 EFFECTS OF RADIUM RAYS IN THE SOIL June 8. Heights of seedlings above the surface of the soil as follows : A i,Soo,ooo X 1 41,50 mm. 2 3 44-50 4 45-oo 5 47-oo 6 7 38-00 8 53-50 9 53-50 10 4500 11 12 37'Oo Av 54.^.00 mm. mm. B C D 1,500,000 X Radio-tellurium Control mm. mm. mm 33-50 40-50 45-50 injured 39-00 injured 54-50 65-50 injured injured 39-50 33-00
Effects of the rays of Effects of the rays of radium on plants . effectsofraysofr1908gage Year: 1908 142 EFFECTS OF RADIUM RAYS IN THE SOIL June 8. Heights of seedlings above the surface of the soil as follows : A i,Soo,ooo X 1 41,50 mm. 2 3 44-50 4 45-oo 5 47-oo 6 7 38-00 8 53-50 9 53-50 10 4500 11 12 37'Oo Av 54.^.00 mm. mm. B C D 1,500,000 X Radio-tellurium Control mm. mm. mm 33-50 40-50 45-50 injured 39-00 injured 54-50 65-50 injured injured 39-50 33-00 injured 45-50 39-50 519-50 mm. mm. mm mm. mm. mm Acceleration of growth has followed exposure to all the radio- active substances. (See figure 27.) 44 40 36 32 i 28 24 g 20 16 12 8 4 0 Expenvieiit 38. Acceleration of growth by radium rays in the soil. 5 6 Day of month Fig. 27. Triticum vulgare. / '6-
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