Citation Hunt

Leaderboard

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page John Harrison:

This text has been unreferenced on Wikipedia for a very long time. If you can't find a source, be bold and remove it!

"

Harrison spent seventeen years working on this third "sea clock", but despite every effort it did not perform exactly as he had wished. The problem was that, because Harrison did not fully understand the physics behind the springs used to control the balance wheels, the timing of the wheels was not isochronous, a characteristic that affected its accuracy. The engineering world was not to fully understand the properties of springs for such applications for another two centuries.[citation needed] Despite that it had proved a very valuable experiment and much was learned from its construction. Certainly with this machine Harrison left the world two enduring legacies–the bimetallic strip and the caged roller bearing.