13163. City Water Supply (11:09)

Date:
1946
Main contributors:
See Other Contributors
Summary:
Animated drawings review man's dependence upon water for life. Describes the sources of city water supply--wells, rivers, lakes, and watersheds; water-borne diseases; and methods of water distribut...

13171. The seaport (16:18)

Date:
1962
Main contributors:
Encyclopaedia Britannica Films; Ernest Horn; Larry Yust
Summary:
Describes the procedure by which a seaport receives cargo for distribution. Shows conveyor systems, pumps, and electromagnets used in handling goods; and explains the work of seamen, longshoremen, ...

13178. Library 305 (58:58)

Date:
February 17, 1989 to June 21, 1989
Main contributors:
WSJV News