What discoveries were there in 1868?

* The first successful typewriter was invented by Christopher Sholes. This machine, known as the "Type-Writer," used a type wheel to print characters onto paper.

* Alfred Nobel patented dynamite. This powerful explosive was used in mining, construction, and warfare.

* William Crookes discovered the element thallium. This element is a soft, silvery metal that is used in electronics, alloys, and semiconductors.

* Thomas Edison invented the electric vote recorder. This machine allowed voters to cast their ballots electronically, which was a significant improvement over the traditional paper ballot system.

* The first traffic light was installed in London. This traffic light was manually operated and used red and green signal lamps to control traffic.