  Mechanical MagicCube.
Mechanically (pyrotechnically) fired GE MagiCube flash cube. Remarkably, these flash bulbs have no electrical contacts. A thin tube filled with contact-sensitive explosive (I would guess mercury fulminate) leads into each bulb, and is set off with a sharp knock on the bottom.
Source: eBay seller clinia
Contributor: Theodore Gray
Acquired: 2 April, 2009
Text Updated: 7 April, 2009
Price: $5
Size: 1.25"
Purity: <10%
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