Physics of Racing, parts 19 and 20

["Brian Beckman" <brianbec@microsoft.com>]

.doc and .djvu (www.lizardtech.com) formats only, this time.  for
various reasons i couldn't makde .sit and .pdf files this time, and
probably won't be able to do in the future.  as always, tho', these are
copylefted out to the community, so feel free to copy, convert, host &
post 'em. 

http://www.geocities.com/brianbec6/phors019.zip
http://www.geocities.com/brianbec6/phors020.zip