""A Popular Sketch of Electromagnetism or Electrodynamics: and Outlines of the Parent Sciences of Electricity and Magnetism"" is a book written by Francis Watkins and originally published in 1856. The book is a comprehensive guide to the study of electromagnetism and electrodynamics, and provides readers with an understanding of the principles and theories that underlie the science of electricity and magnetism. The book is divided into several sections,...