Air Pressure and Gravitation

Duration: 14 min

Genre: Natural Science

Creator: Bray

Format: 16mm

Color: B&W

Sound: Silent

Description: Combines three Bray physics films: (a) The Air Pressure in Which We Live, lab demonstration of the collapse of an evacuated metal can, and the drawing of a shelled hardboiled egg through a narrow bottle neck by vacuum suction. (b) Peculiarities of Air, further lab experiments show water boiled with ice, cotton burned with liquid air. (c) Gravitation of Liquids, first two, then five liquids are shown to possess definitely different densities.

Metadata Source:Bell & Howell Filmosound Library Catalog of Educational Motion Pictures, 1942