Cast
1949
10min 04
0
Compartir
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.
Ver CastGéneros
Cast
CATEGORIAS
1949
10min 04
Compartir
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.
Ver Cast
