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 transcontinental. telegraph line was built by the Western Union along the railroads in 1851 and then theys began their profits. For economic reasons, the Post and Telegraph department intervened in 1881 and it was in 1943 that the Post and Telegraph department and the Western Union joined hands.