yes ... a very low 'pitch' plop. RiB On Wed, Sep 15, 2010 at 07:54, RussellMc wrote: > If a drop of pitch drops in a bell jar and nobody is there to see it > (and the webcam misses it too), does it make a sound? > Located in Australia, 8 drops of pitch have fallen from this > apparently solid lump since 1930 - the last in 2000. Webcam monitored > nowadays but Murphy intervened to ensure that nobody has ever seen a > drop fall. > > http://en.wikipedia.org/wiki/Pitch_drop_experiment > > http://www.physics.uq.edu.au/physics_museum/pitchdrop.shtml > > > http://upload.wikimedia.org/wikipedia/commons/6/62/University_of_Queensla= nd_Pitch_drop_experiment-6-2.jpg > > http://www.physics.uq.edu.au/physics_museum/pitch2.gif > > This clock has run on "atmospheric power (in New Zealand) since 1864, > but has stopped or been stopped very occasionally > > http://en.wikipedia.org/wiki/Beverly_Clock > > This electric bell has operated "almost continuously" since 1840. > This could be easily replicated with a modern lithium primary cell for > a life of 10+ years. Their battery is obviously made of sterner stuff > - but nobody knows what. > > http://en.wikipedia.org/wiki/Oxford_Electric_Bell > > > Russell McMahon > > > > Ref: David Daniel > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .