Experiments and Observations on Electricity is a mid-eighteenth century book consisting of letters from Benjamin Franklin. These letters concerned Franklin's discoveries about the behavior of electricity based on experimentation and scientific studies. The book came in pamphlet form for the first three English editions. The last two editions were in a book volume with hard covers and a book spine. There were eleven European editions of the book: five English editions, three French editions, and a German, Italian and Latin edition. The publication was well received worldwide. It was considered America's most important scientific book of the eighteenth century.