This demonstration governor is in storage at the Cornell University physics department in Rockefeller Hall. The mechanism was of vital importance when stationary steam engines provided the motive power for mills and factories, and it was necessary to maintain a constant engine speed despite varying loads. One can also think of it as an early example of a feedback mechanism. 

   The driving handle is not original.  


   The demonstration governor at the left is designed to be used with a rotator.

   It is in the apparatus collection of Case Western Reserve University in Cleveland, Ohio, and has no maker's name.

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