Joseph Priestley, the renowned 18th-century chemist and theologian, delivered a series of lectures on experimental philosophy at New College in Hackney. These lectures covered a wide range of topics, including electricity, optics, and mechanics, in addition to chemistry. This detailed overview of his teachings is an invaluable resource for anyone interested in the history of science or the philosophy of experimentation. 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.