Discusses the evolution of measurement techniques throughout history, emphasizing the transition from primitive methods to modern precision instruments. It highlights
These archival film clips reveal the intricate workings of a historical electronics company, showcasing the skilled craftsmanship, complex machinery, and
This film discusses the halogens, specifically chlorine, bromine, and iodine, detailing their preparation from naturally occurring salts and their chemical
A point-of-public-contact training film for library staff. Effectively treats several areas of patron/staff relations : circulation, audio-visuals, the home-bound, references,