
Excursions in Science No. 4
Excursions in Science No. 4
Guarda excursions in science no. 4 su StreamingCommunity. The marvels of the "Electric Eye" scientifically known as the photo electric cell are very entertainingly presented in this industrial from the laboratories of General Electric. A narrator explains everything in popular language.
- Genere: Documentario
- Nazione: United States
- Direttore:
- Cast:

