More "Ballin' The Jack" Trivia
Thanks to Jim Polaski
2. A railroad signal indicating full speed ahead.
In railroad terms, there was a time when signals were done with "Balls" on a tall stand. When the track was clear, the ball was hoisted to the top indicating a "high ball" or the train could move at high, or track speed. A derivation was "balling."
"The Highball Signals ... " were thirty (30) feet high and located about three miles apart. The first signal used black and white flags but they did not unfurl properly all the time. Bell-shaped peach baskets were suspended from masts thirty (30) feet high, located about three (3) miles apart. They were later replaced with large metal spheres. They were known as ball signals."