Solar furnace

[Arcane]

Title says it all.

http://articles.mercola.com/sites/ar...elts-rock.aspx

[masimec]

Where this machine capture solar ray???

[macona]

My WAG is from the roof through a mirrored tube.

[darryl]

Awesome! Gotta make me one of those- oh wait- you need sunshine. Hmm. I'll have to wait til summer. Until then, I have an idea- make up a continuous long strip of clear plastic that has an ever encreasing bevel angle on one edge. Then you wind it into a flat spiral and it becomes a giant fresnel lens.