Projection from Son et Lumière for Earth, Air, Fire and Water

"The presentation of earth, air, fire, and water by the projection of various chemical and physical reactions occurring in special containers in the projectors, with the amplification of the sound of the actual reaction, or tapes of colossal reactions in the same medium or with performed sound using the medium (i.e., rock movement, storm, fire, or waves)."—(Locher, p 65) Mark Boyle's Journey to the Surface of the Earth