Close up we see pistons move up and down or side to side. Pendulums sway, the small parts of machinery move. Gears drive larger wheels. Gears within gears spin. Shafts turn some mechanism that is out of sight. Screws revolve and move other gears; a bit rotates.
Mechanical Principles (1930) by Ralph Steiner, originally a silent film re-edited and mixed by James Théophane.
Ralph Steiner (February 8, 1899 – July 13, 1986) was an American photographer, pioneer documentarian and a key figure among avant-garde filmmakers in the 1930s. The original can be found on a collection entitled "Unseen Cinema: Early American Avant-Garde Film 1894-1941".
Featuring: Still Life (Orchestral Version).