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.
The first underground railway on the Continent was the fÃ¶ldalatti in Budapest, which opened in 1896. The first underground railway in the U.S. was the trolley tunnel that opened in Boston in 1897 (the Tremont Street Subway). Rapid transit (subway) trains began using the Tremont Street Subway in 1901.