A drop of water is taken to a laboratory in San Juan, Puerto Rico to determine its purity. The film communicates scientific health information, such as the need to boil drinking water.
Released: Apr 13, 1949
Runtime: 10 minutes
Genre: Documentary
Stars: Amílcar Tirado
Crew: José R. Ramírez (Music), Jesús Figueroa (Assistant Camera), Jack Delano (Cinematography), Jack Delano (Director), Edwin Rosskam (Screenplay)