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Ghost Mine
A ghost mine is a pyrotechnic device which projects a large, ethereal-looking colored fireball into the sky. The effect is produced by mixing methyl alcohol with a pyrotechnic colorant. Since alcohol burns with a nearly invisible flame, all that is seen by the audience is a cloud of glowing color (the colorant) taking the shape of the invisible fireball.〔(How to make fireball ghost mines ), Skylighter inc, 2007 (accessed 22 January 2007)〕 It was invented by Chris Spurrell, a research chemist from Hawthorne, California.
== References ==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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