Excursions in Science No. 2

• 1936
• •
• 10m

• Documental

Toothless gears (actuated by magnetism); a photoelectric sorter, for beans; the manufacture of lamps. Well photographed and adequately narrated, this holds interest all through. Especially absorbing is the last section.

Fecha de estreno

26 feb 1936

Idioma original

inglés

Origen

Estados Unidos