Grid Game by Mark James
A CD spectrometer
A simple spectrometer can be built from a CD and a box. Cut a slit on one side of the box. Place the CD on the other side with about 60 degree angle. Look down into the openning on the box. The slit should not be too wide, otherwise the spectrum ...
BookMooch: trade your books with other people
The reason: the server console is giving the scary message "drive failure is imminent" and so I've decided to back everything up and shut BookMooch down as I wait to get a new hard drive to swap out.