11. :: I think the tuning fork necessarily vibrates with the two ends in phase. 12. He looks through the vibrating tuning fork at the line pattern on the hub. 13. Bulova made its last tuning fork movement wristwatches in 1977. 14. In 1866 he patented an electric clock controlled by a 100 Hz tuning fork . 15. The rise in pitch during this time can be seen reflected in tuning forks . 16. They predicted that, like tuning forks , the smaller the glass, the higher the frequency. 17. Tuning forks , usually C512, are used by medical practitioners to assess a patient's hearing.18. Well-known manufacturers of tuning forks include Ragg and John Walker, both of Sheffield, England. 19. Sonar prepared for his next skirmish with Green Lantern by creating a tuning fork gun. 20. To properly fit the skin to the frame, a tuning fork had to be used.
