The Postal Station Explores the development of postal services and visits a huge postal station to show what happens to a letter after you drop it in a mailbox. NTTI Lesson 12. Lightbulbs Describes the manufacture of incandescent fluorescent bulbs. Roads and Bridges Compares old and new techniques of road building. A history of tunnels and their builders, and a look at the Hong Kong subway.
Trucks Shows the history of trucks and trucking.
Featured footage shows the assembly of a Mack truck from the ground up. Houses Traces the development and construction of houses from early times. Children build a model neighborhood, then viewers see a modern subdivision. At the Campbell's Soup factory, viewers see how vegetable soup is made - from chopping vegetables to canning.