As near as makes no difference, you are correct -- youcan get "elutriating times" for different particle sizes, but I find these pretty useless since they are based on a 1 metre column of water :-)
> 4. Let the slurry in the second container separate
> and then pour off the clear water on top. Drain the
> rest of the mixture onto filter paper and let dry in a
> clean, dust free environment.
Actually, I just siphon off the clear water -- seems a bit futile to risk recontamination just to dry out something you're going to use wet! :-)
Clear Skies, Steve <sft@aegis1.demon.co.uk>