On Tue, 1 Sep 2009 12:05:53 +0100, Terry Casey
wrote:



Why do flour mills explode?

The same reason that explosions occurred in some cotton mills.

http://en.wikipedia.org/wiki/Dust_explosion

Connect a funnel to a (longish) length of tubing.
Block the bottom of the funnel with a loose plug of tissue and pour
flour into the funnel.
Place a lighted candle on the top of a wall or similar, a couple of
inches from the edge.
Hold funnel against wall and place 7lb biscuit tin or similar over both
candle and funnel, so that funnel is held in place btween tin and wall.
Blow sharply down tubing.
The tin may travel some considerable distance, so stand well clear!


EXPLAIN

--
Peter Duncanson
(in uk.tech.digital-tv)