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Gravity powered machines.. There are patents on them, and they have to have working machines to get this type of patent. They operate on the same principle as a weight on one side and a pail to lift water on the other side with this ancient egyptian machine the same in use to lift water on the Nile except the water lifted being used to power a machine as it refalls to Earth such as a hydroelectric turbine.

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Near the end of the 19th century, Thomas Edison invented a new and revolutionary lighting source, requiring no burning of whale oils or gas which would also shed light on their needs with even greater intensity. Only a few could have envisioned the future global use of the incandescent light bulb. This new light source would eventually become the most widely used light source on earth.