III. Preliminary note on the radiation from a revolving disk

Abstract

The authors having been led by perfectly distinct trains of reasoning to identical views bearing on the dissipation of energy, have had preliminary 'experiments made on the increase of radiation from a wooden disk on account of its velocity of rotation, both in the open air and in vacuo . These experiments were made with a very delicate thermo-electric pile and galvanometer. In the experiments in the open air the disk was of wood; its diameter was 9 inches, and it was made to rotate with a velocity somewhat less than 100 revolutions in one second.