Published in 1908, this book is a pioneering study of the effects of radium radiation on plant growth and development. The author, Charles Stuart Gager, was an American botanist who conducted a series of experiments that demonstrated the profound effects of radium radiation on the morphology and physiology of various plants. This book remains a classic of plant biology, and is essential reading for anyone interested in the effects of radiation on living systems. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.