Making Glasses from Scratch

The Knowledge has a post with a 15 minute video from How To Make Everything which details making a pair of glasses from scratch.

Chainmaking

Boing Boing has a post with an animated GIF showing a machine making chain.

Power on Tap

Low-Tech Magazine has a post explaining that before the spread of electricity people used to power household devices using the water pressure from their water taps.

Mayan Calendar Converter

Now that we know the Mayan calendar still works, the New York Times has a page that converts dates to and from the Mayan system. 

The Evolution of the Airline Baggage Tag

Slate has an interesting article about the evolution of the baggage tags used on commercial airplanes.  There's more to it than just the bar code.

via Flowing Data

How Corks Are Made

WineAnorak has an nicely illustrated two part article explaining how corks are made.

via kottke.org