Electricity, History Of
Electrical effects were known to the ancients through the attraction that amber, when rubbed, had for lightweight objects. They were also aware of the seemingly unrelated phenomenon of lightning. There is the further possibility that a form of electric battery was used for electroplating in Mesopotamia, but the evidence is meager and, even if true, there were no long-term consequences.
The term "electric" comes from the Greek word for amber and was coined by William Gilbert in his book on magnetism, published in 1600. Gilbert showed that other materials had this same attractive property and made the important observation that it was quite different from the attractive property of magnetism.
Although the subject was not abandoned, serious experimentation arguably began with the work of Francis Hauksbee, Stephen Gray, and Charles Dufay in the early decades of the eighteenth century. By rubbing glass rods to generate electric charge, and using silk threads as conductors, they were able to develop a basic understanding of conduction and to stimulate thinking about the nature of electricity.
Two inventions in the 1740s changed the electrical scene dramatically. One was the frictional machine, which made it possible to generate continuous streams of electricity relatively easily; the other was the condenser, or Leyden jar, which made possible the storage and sudden discharge of substantial quantities of electric charge.
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