As a foundational concept in physics, the force of gravity has been the subject of much study and debate over the centuries. This book, first published in 1785, offers a detailed analysis of the nature of centripetal and centrifugal forces, and their relationship to gravity. The author, a bishop and scholar of physics, provides a clear and compelling argument in favor of a precise mathematical formulation of these concepts. This is an important work for historians of science and anyone interested in the history of physics. 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.