Compton generator

Arthur Compton was experimenting by the Compton Generator. The box is constructed out of asbestos to minimize the temperature differential across the ring, which causes errors since it creates convectional current. There is a further screen of asbestos in front of Compton in order to prevent his breath from hitting the box of asbestos.

A Compton generator or Compton tube is an apparatus for experiment to demonstrate the Earth's rotation, similar to the Foucault pendulum and to gyroscope devices. Arthur Compton (Nobel Prize in Physics in 1927) published it during his fourth year at the College of Wooster in 1913.