Tuning Fork, Electricallymaintained

For Producing Vibrations In The Stretched Strings. Comprises A Thick Sturdy Steel Tuning Fork With Its Stem Held Securely In Cast Metal Clamp, Which In Turn Is Mounted On A Sturdy, Streamlined, Heavy Cast Metal Base With Provision For Horizontal Or Vertical Use. An Electromagnet Operating On 6V Is Positioned Between Both The Prongs And Can Slide Along The Prongs Length For Adjusting The Amplitude Of Vibration Of Prongs. End Of Both The Prongs Have A Stylus For Frequency Measurement And Threaded Arrangement For Meldes Experiment. (Tuning Fork, Electrically Maintained)