Thursday, August 20, 2015

Candle clock

Before there were clocks, there were candle clocks that burned a set amount of hours. If you wanted a reminder or alarm, you pushed a nail at the desired time length in the candle and when it melted to that point, the nail would fall and clank on the metal holder alerting you.

No comments:

Post a Comment

Note: Only a member of this blog may post a comment.