An ounce is a unit of weight which is approximately equal to 28  grams. One gallon is equal to 128 ounces so there are 640 ounces in  5 gallons of water.
The first U.S. railroad to use a steam locomotive in revenue service was the South Carolina Railroad. It opened on Christmas Day 1830 using the Best Friend of Charleston steam locomotive on six miles of track in Charleston, South Carolina.
Although Illinois could not boast having the first steam-powered railroad in the United States or the Midwest (Maryland in 1828 and Ohio in 1836 claimed those honors), residents could brag of being the home state for some of the earliest American carriers.