From: vitalmis@bigpond.net.au   
      
   toddh wrote:   
      
   > On Wed, 7 Jan 2004 16:11:22 +0000 (UTC), Poliisi wrote:   
      
   > Mount a pump with a rotating nozzle and hit them with a   
   > jet of air. Would also be handy to stir up ground dust for   
   > analysis.   
      
   I suspect this would not work. Look at the build-up of dust   
   on fan blades, and these have a much greater flow of air at   
   a much greater density.   
      
   Keith Harwood.   
      
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