The Fermat's spiral reference article from the English Wikipedia on 24-Jul-2004
(provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Fermat's spiral

Time you got around to sponsoring a child
Image:fermat_curve.gif
Fermat's spiral (also known as a parabolic spiral) follows the equation:

It is a type of Archimedean spiral

See also: Polar coordinates, Spiral