4Adjusting the Pendulum with Pennies
Source: Envato Elements
The Great Clock is usually adjusted with an old English penny every year. If the clock runs too fast, a penny will be added to the pendulum; if it runs too slow, a penny will be removed from the pendulum. The London Clock gains of 2/5 of a second per day from every penny added. Click the next ARROW to see the next photo!
