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1876
George R Carey of Boston, USA invented a "selenium camera" which was a device that would allow people to "see by electricity." Other similar devices at the time were called telectroscopes.
Eugen Goldstein experiments with cathode rays and used the term to describe the light emitted when an electric current was forced through a vacuum tube
1878 - George Eastman was one of the first to demonstrate the great convenience of Gelatin dry plates over the cumbersome and messy wet plate Photography prevalent in his day. Dry plates could be exposed and developed at the photographer's convenience; wet plates had to be coated, exposed at once, and developed while still wet
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