Fritz Lang's 1927 masterpiece Metropolis shows some interesting examples of early experimentation with neon as a scuptural medium. Seen here on the desk of scientist Rotwang is a large inverted vortex showing off some fantastically big electrodes.
Meanwhile, in the laboratory...
What is the source of the second image? It does not appear in the movie, not even in the version with recovered scenes, I had never seen it before.
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