This book is a comprehensive guide to the use of two astronomical instruments: the globes and the orrery. The author, David Jennings, provides detailed instructions for using these tools, as well as a wealth of information on astronomy and its applications to chronology. With clear explanations and numerous diagrams, this book is an ideal resource for anyone interested in the history of astronomy or the technology of scientific instruments. 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.