1) Fulton's Folly: It was a steamboat by Robert Fulton. He did not invent it as some credited him for, but he was the first to make a commercial success out of it. The boat carried paying passengers from New York up to Albany.
2) Tom Thumb: The Tom Thumb was a steam locomotive that was used to showcase the American potential to create engine to Baltimore and Ohio Railroad.
3) The airplane: The airplane was a success, it was first used in WWI for combat, later people started to use it to transport mail. In WWII it was used as a mode of transportation. Later it was transformed as a common way of transport for all the people.
4) The Model T: The Model T was a car that was produced by Ford Motors. It was very common because it’s price and because of this middle-class Americans were able to buy it and use it was a way of transport.
Andrew Carnegie founded the Bessemer Process, which quickened the steel making process. He also used Vertical Integration to corner the steel market.
Sources such as diaries though not very reliable can be used if there are a large amount of them showing the same date and event. Historical books written about the event especially those closer to the time would be able to help determine that the date is accurate as well.
Its because science came to be that it relied on big projects. I hope I could help! :D
