Editing Centennial Exposition (section)

== Inventions ==
[[File:Centennial Exhibition monorail (LOC) - crop 02.jpg|thumb|The [[Centennial Monorail]], a steam locomotive and one of the inventions presented at the exposition]]
The [[Centennial Monorail]] featured a steam locomotive and passenger car that straddled a single elevated iron rail. Mass-produced products and new inventions were on display within Machinery Hall. Inventions included the [[typewriter]] and [[electric pen]] along with new types of mass-produced sewing machines, stoves, lanterns, guns, wagons, carriages, and agricultural equipment.

The exposition also featured many well-known products including [[Alexander Graham Bell]]'s first telephone, set up at opposite ends of Machinery Hall, [[Thomas Edison]]'s automatic telegraph system, screw-cutting machines that dramatically improved the production of screws and bolts from 8,000 to 100,000 per day, and a universal grinding machine by the [[Brown & Sharpe|Brown & Sharpe Manufacturing Company]].

Air-powered tools along with a [[mechanical calculator]] by [[George B. Grant]] were exhibited. [[John A. Roebling]] & Sons Company displayed a slice of their 5 ¾ inch diameter cable to be used for the [[Brooklyn Bridge]]. New food products such as [[popcorn]] and [[ketchup]], along with [[root beer]], were also exhibited.

Consumer products first displayed to the public include:
* [[Alexander Graham Bell]]'s [[telephone]]
* [[Sholes and Glidden typewriter|The Sholes and Glidden typewriter (also known as the Remington No. 1)]]
* [[Heinz Ketchup]]
* [[Moses G. Farmer|Wallace]]-Farmer Electric Dynamo, precursor to [[electric light]]
* [[Hires Root Beer]]
* [[Kudzu]] erosion control plant species