jonesvilletexas
Premium Member
Answer
The solution was a metal plate with 16 round dimples, called, for reasons unknown, a Monkey. But if this plate were made of iron, the iron balls quickly rusted to it. The solution to the rusting problem was to make the plates of brass - hence, Brass Monkeys.
Few landlubbers realize that brass contracts more, and more rapidly than iron when chilled. Consequently, when the temperature dropped too far, the brass indentations would shrink so much that the iron cannon balls would come right off the monkey.
Thus, it was quite literally, cold enough to freeze the balls off a brass monkey. And all this time, you thought that it was just a vulgar expression, didn't you?
Passed on to me from Brother Lee Smith. Thanks brother