Fecha de lanzamiento

13 Apr, 1949

Tiempo de ejecución

00:10: (HH:MM)

Sinopsis

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.

Fotos

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Actores

Amílcar Tirado

Multitud

Jesús Figueroa

Jack Delano

José R. Ramírez

Jack Delano

Edwin Rosskam