Watson provides a comprehensive overview of the mathematical principles governing the movements of celestial bodies. He discusses the laws of motion and gravity as they relate to planetary motion, and provides detailed explanations of the various mathematical formulae used to calculate the positions and movements of the planets. This is an essential resource for anyone interested in the history and development of astronomy.

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.