404 Page not found
The machine has looked everywhere.
But what does it know? It's just a machine.
I can never stop improving and "fixing" things so the page has probably moved and now the link is broken.
File names usually stay the same though. You could try searching (search box at top of sidebar) on any part of the name. For instance:
http://www.molvray.com/acidtest/2007/08/advanced-paper-2-stirling-engines/
or in bryophyte photos: Sphaerocarpos-texanus-bottlewort-Sage-Ranch-Santa-Susana-Mts-2013-01-05-IMG 7129
If the machine ever gets out from under that carpet, we can hope it'll find it.
If that doesn't happen, please contact me.
Or if the Internet Archive has a cached version of the page, it'll show up here: