TABLE OF CONTENTS 



Chapter Page 



I. The Discovery AND Nature OF Radioactivity i 



II. Radioactivity A Factor OF Plant Environment 22 



III. Previous Investigations upon Animals 43 



IV. Previous Investigations upon Plants 56 



1 . Effects of Rontgen Rays on Plants 56 



2. Effects of Radium Rays on Plants 59 



3. Effects of Radium Rays on Plant Fibers 68 



V. Bio-Radioactivity, Eobes, Radiobes 74 



1. The Supposed Radioactivity of Plants and Wood 74 



2. The Professed Artificial Creation of Life 76 



VI. Radium Preparations and Methods of Exposure 81 



VII. Effects on Growth of Exposing Seeds to Radium Rays 84 



1. Effects on Growth of Exposure of unsoaked Seeds 84 



2. Effects on Growth of Exposing Seeds while soaking 90 



3. Effects on Growth of Exposing soaked Seeds 102 



4. Effect of Duration of Exposure and Degree of Activity., iii 



VIII. Effects of Radium Rays in the Soil on Germination 



AND Growth 135 



IX. Effects of a Radioactive Atmosphere on Plant 



Growth 146 



X. Effects on Plant Growth of Exposed Water and 



Freshly Fallen Rain 158 



1. Effects of Tap- Water exposed to Radium Rays 15S 



2. The Radioactive Influence of freshly fallen Rain- Water.. 173 

 XL Effects on Plant Growth : Miscellaneous Experi- 

 ments 1 80 



XII. Effects of Radium Rays on the Synthesis of Carbo- 

 hydrates 188 



1. Effect on Photosynthesis 188 



2. Effect on the Conversion of Cane-Sugar to Starch in the 



Dark 191 



3. Effect on Chlorophyll Solution and Chlorophyll Paste... 193 

 XIII. Effects of Radium Rays on Plant Respiration 196 



1. Effect on Aerobic Respiration 196 



2. Effect on Anaerobic Respiration 202 



