
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.
Status
Release Date
April 13, 1949
Runtime
0h 10m
Rating
(0 votes)
Genres
Production Companies
Overview
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.