How To Dial

Browse through the Prelinger Archives. Rick Prelinger spent almost 20 years collecting over 48,000 "ephemeral" (advertising, educational, industrial, and amateur) films. In 2002, the film collection was acquired by the Library of Congress, Motion Picture, Broadcasting and Recorded Sound Division.

One of the more fascinating ones is an instructional film on one of the cutting edge technologies of the 20's. It's called "How To Use the Dial Telephone". (The layout may be a bit confusing for some. Basically you can download or view streaming with Real or QuickTime. Use the links on the left of the page)
(via Incoming Signals)