Reid also had a safety fuse containing black powder, a U.S. government official said.

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"As soon as I saw the video of the explosion, I said that looks just like black powder, " Mr. Conkling said.

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The ingredients included sugar and a black powder made from match heads.

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Common uses for black powder include as gunpowder in muzzle-loading guns, as a blasting powder and as a propellant in rockets for fireworks.

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Black Powder Media showed up at our double-wide HQ with a couple Bluetooth Impulse Controllers on hand for us to play with.

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These are wrapped in carbon nanotubes - tiny "straws" of pure carbon that are renowned for their electrical properties - and coated with a platinum black powder.

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The black powder had been scooped out.

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Soon the trees disappeared, the gradient increased and the soil became black and powder-fine.

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There are a number of Deringer's pistols in the auction that come complete with their original black leather-covered cases, powder flasks, cleaning rods and other tools.

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And while these works may seem ephemeral - often made from sand and mud rather than canvas and paint, their creators clearly expect them to survive beyond the next exhibition, leaving detailed instructions of how to recreate the work, and often rebuilding it themselves (as Turner nominee Karla Black did last week with her powder and make-up creation on the floor of Tramway).

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First, black managers will be better able to sell things, from insurance to soap powder, to other blacks.

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