Lazzaro Spallanzani was an Italian biologist and physiologist who made significant contributions to the fields of anatomy and physiology. In this book, Spallanzani describes his experiments with animal reproduction, including artificial insemination and cross-breeding. This work was highly influential in the development of modern biology and remains an important resource for students and scholars of the subject. 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.