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Does anyone know what liquid is in the unextruded soda bottles along
with ferrofluid in the "ferrofluid display cells?" These are available
at Educational Innovations for $38.50 each.  We need a number of them
for a new program.  Smaller glass vials are available for $20 each, but
we do not want to use glass.

Thanks,
Becky

Becky Fox Matthews
Senior Educator/Special Projects Manager
Adventure Science Center
800 Ft. Negley Blvd.
Nashville, TN 37203
voice: 615-401-5073

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