Professor Mark Sutherland, University of Toronto.

http://205.216.138.19/~websites/
topquark/fun/JAVA/electmag/
electmag.html

TControl the inital (nonrelativistic) velocity of an electrically charged particle in a (controllable) constant magnet field.

Professor Sutherland has a collection of physics applets and tutorials at fun@learning.physics.

by Gary Siuzdak and Jennifer Boydston, The Scripps Research Institute.

http://masspec.scripps.edu/hist.html

A History of Mass Spectrometry is a dynamic, interactive record of significant events in the evolution of the science. Interesting use of a mass spec diagram to show the time line of the development of Mass Spectrometry.