Gold Dollar - The 1879 Gold Dollar had a very small
mintage of 3,000. Many were saved in quantity. Most are
in Mint State, but not many are gems. The word LIBERTY is
often weak or missing. Surfaces are often prooflike.
In 1879 Thomas Edison invented the light
bulb. Edison developed many devices that influenced life
including the phonograph and the motion picture camera.
He applied the principles of mass production to the process
of invention and is credited with the creation of the first
The incandescent light bulb produces light
by heating a filament to a high temperature until it glows.
It is supplied with electrical current by wires embedded
in the glass. Most are used in a socket, which gives mechanical
support and electrical connections.