Electrification is the process of powering by electricity and, in many contexts, the introduction of such power by changing over from an earlier power source.

George Washington was an American political leader, military general, and Founding Father who served as the first president of the United States from 1789 to 1797.

Isambard Kingdom Brunel was a prominent and innovative engineer during the 19th century in Britain.

A micrometer, also known as a micrometer screw gauge, is a precision measuring device used for obtaining extremely accurate measurements of relatively small objects.