First published in 1908, this book is a landmark study of the ecology of the Illinois River. Written by two pioneering biologists, it presents the results of their long-term observations and research on the river's plant and animal life. A must-read for anyone interested in freshwater ecology or the history of scientific inquiry. 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.