“Simple harmonic motion by animated diagrams; photographs of experiments with pendulums and vibrating cords.” - BFI. “ “A scientific film explaining the movement of the Sinusoidal Pendulum.” - The [London] Film Society, 1938.
All 12 jury members who sent an innocent man to the gallows are gathered together for a demonstration of how convictions can be made on circumstantial evidence.
To win the heart of a rather simple minded young man who doesn't seem to care much for women, a young foreign lady takes a job as the chambermaid to the man's sister in law.