From: Francis X Roarty Subject: [Vo]:old concrete or limestone a great fuel source
* I have been waiting for someone to mention calcium or limestone. Calcium is a porous alkaline earth metal and conductive making it capable of forming Casimir geometry.. You might want to take a look in the archives - at a speculative thread from a few years back: http://www.mail-archive.com/[email protected]/msg25947.html
