Like all cellular organisms, humans run on electricity. Slight imbalances of electric charge across cell membranes result in sensation, movement, awareness, and thinking—nearly everything we associate with being alive. Robert Campenot offers a comprehensive overview of animal electricity, examining its physiological mechanisms as well as the experimental discoveries that form the basis for our modern understanding of nervous systems across the animal kingdom.

Cells work much like batteries. Concentration gradients of sodium and potassium cause these ions to flow in and out of cells by way of protein channels, creating tiny voltages across the cell membrane. The cellular mechanisms that switch these ion currents on and off drive all the functions associated with animal nervous systems, from nerve impulses and heartbeats to the 600-volt shocks produced by electric eels.

Campenot’s examination of the nervous system is presented in the context of ideas as they evolved in the past, as well as today’s research and its future implications. The discussion ranges from the pre-Renaissance notion of animal spirits and Galvani’s eighteenth-century discovery of animal electricity, to modern insights into how electrical activity produces learning and how electrical signals in the cortex can be used to connect the brains of paralyzed individuals to limbs or prosthetic devices. Campenot provides the necessary scientific background to make the book highly accessible for general readers while conveying much about the process of scientific discovery.

Benjamin Franklin is well known to most of us, yet his fundamental and wide-ranging contributions to science are still not adequately understood. Until now he has usually been incorrectly regarded as a practical inventor and tinkerer rather than a scientific thinker. He was elected to membership in the elite Royal Society because his experiments and original theory of electricity had made a science of that new subject. His popular fame came from his two lightning experiments—the sentry-box experiment and the later and more famous experiment of the kite—which confirmed his theoretical speculations about the identity of electricity and provided a basis for the practical invention of the lightning rod. Franklin advanced the eighteenth-century understanding of all phenomena of electricity and provided a model for experimental science in general.

I. Bernard Cohen, an eminent historian of science and the principal elucidator of Franklin’s scientific work, examines his activities in fields ranging from heat to astronomy. He provides masterful accounts of the theoretical background of Franklin’s science (especially his study of Newton), the experiments he performed, and their influence throughout Europe as well as the United States. Cohen emphasizes that Franklin’s political and diplomatic career cannot be understood apart from his scientific activities, which established his reputation and brought him into contact with leaders of British and European society. A supplement by Samuel J. Edgerton considers Franklin’s attempts to improve the design of heating stoves, another practical application that arose from theoretical interests.

This volume will be valuable to all readers wanting to learn more about Franklin and to gain a deeper appreciation of the development of science in America.

Benjamin Franklin's invention of the lightning rod is the founding fable of American science, but Franklin was only one of many early Americans fascinated by electricity. As a dramatically new physical experience, electricity amazed those who dared to tame the lightning and set it coursing through their own bodies. Thanks to its technological and medical utility, but also its surprising ability to defy rational experimental mastery, electricity was a powerful experience of enlightenment, at once social, intellectual, and spiritual.

In this compelling book, James Delbourgo moves beyond Franklin to trace the path of electricity through early American culture, exploring how the relationship between human, natural, and divine powers was understood in the eighteenth century. By examining the lives and visions of natural philosophers, spectacular showmen, religious preachers, and medical therapists, he shows how electrical experiences of wonder, terror, and awe were connected to a broad array of cultural concerns that defined the American Enlightenment. The history of lightning rods, electrical demonstrations, electric eels, and medical electricity reveals how early American science, medicine, and technology were shaped by a culture of commercial performance, evangelical religion, and republican politics from mid-century to the early republic.

The first book to situate early American experimental science in the context of a transatlantic public sphere, A Most Amazing Scene of Wonders offers a captivating view of the origins of American science and the cultural meaning of the American Enlightenment. In a story of shocks and sparks from New England to the Caribbean, Delbourgo brilliantly illuminates a revolutionary New World of wonder.