| In the heyday of the sailing ship, every vessel had to have cannons
for protection. The cannons of the times required round iron cannon
balls. Now, the ship's quartermaster wanted to store the cannon balls
such that they could be of instant use when needed, yet not roll around
the gun deck. The logical solution was to stack them in a square-based
pyramid right next to the cannons. So, the top of the stack had one
ball, the next level down had four, the next had nine, and finally
the lowest had 16 balls. Thus, four levels comprised a stack of 30
cannon balls.
The only real problem was how to keep the bottom balls from popping
out from under the weight of the balls on higher levels. To do this,
they devised a flat metal plate, called a "monkey", with
sixteen rounded indentations, one for each cannon ball in the bottom
layer. When iron metal was used to make this monkey"-plate,
eventually the cannon-balls would rust to the plate, causing another
problem. So, these plates came to be made of brass-alloy to prevent
this rust problem--thus becoming named "brass-monkeys".
However, when temperatures drop in cold weather, brass contracts
at a much greater degree than iron. So, as it got colder on the
gun decks the indentations in the brass monkey would get smaller
than the iron balls they were holding, and if the temperature got
cold enough, the bottom layer of cannon-balls would pop out of the
shallow indentations, spilling the entire pyramid all over the deck.
That moment was characterized, quite literally, as :
"COLD ENOUGH TO FREEZE
THE BALLS OFF A BRASS MONKEY."
See there? And all this time most of you thought us "Old
Salts" were just talking dirty...... :) |