A text book of physics, for the use of students of science and engineering (1918)
Duncan, John, d. 1941, Starling, Sydney George, 1873- · London Macmillan · leaf 683
Fig. 604.—Velocity of light (Fizeau). and if not more than about 10 spaces pass F per second, the eyesees a continuous bright illumination. But if the speed be increaseduntil the light travels from F to M2 and back again in the time thatthe wheel has advanced forwards through a distance equal to…
Physics
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.