Publisher Summary To report on new and rapidly developing instruments, such as the luminescent chamber and the high amplification image intensifier, is more difficult than to report on matured instruments. The idea behind the luminescent chamber is simply to record the image of particle tracks passing through scintillating crystals. The usual experiment demands the recording of the light image produced by charged particles whose velocities are of the order of magnitude of minimum ionizing velocities. The virtues of the luminescent chamber in high-energy particle physics are its time resolution, lack of dead time, and the fact that an image tube can be gated so that pictures of only the desired events may be recorded. The chief disadvantages are the inherent lack of spatial resolution and the fact that no one knows how to make a substantially pure liquid hydrogen scintillator.