John Starnes' Urban Farm
Sunday, May 26, 2013
Solar Metallurgy!
http://www.treehugger.com/gadgets/diy-solar-foundry-reaches-temperatures-3800-degrees-farenheit.html?fb_action_ids=10201285676253304&fb_action_types=og.likes&fb_source=other_multiline&action_object_map=%7B%2210201285676253304%22%3A460767380676404%7D&action_type_map=%7B%2210201285676253304%22%3A%22og.likes%22%7D&action_ref_map=%5B%5D
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