Trivia: This is the last episode where we see a mobile Floyd. The actor suffered a stroke. He returned to the show but is hereafter seen sitting or leaning against a wall.
Trivia: When Andy, Barney, the mayor, and Upchurch are at the courthouse with the plaster castings of the footprints, Upchurch has named the sets of prints "Able, Baker, and Charlie." The names "Able and Baker" are also the names of the two monkeys who were launched into space on May 28, 1959 in a Jupiter rocket.
Answer: Those "boxes" are valences that used to be very common, before air conditioning. They allow for windows to be open during rain storms. They permit air circulation, without letting the rain in.