Kathleen Archer Kathleen.Archer at MAIL.CC.TRINCOLL.EDU
Sat May 10 14:38:58 EST 1997

Dear Folks,
Does anyone have a trick to prevent water condensate from forming on the
underside of Petri dish lids?  I've been doing some experiments with tobacco
seedlings by growing them on dampened filter paper in Petri dishes sealed
with Parafilm. A nagging problem is that the water collects on the lid
underside, which dries out the paper and leads to desiccated seedlings.  I
deal with it by tapping the side of the dish everyday to knock down the
drops.  This can't go on because I'm contemplating some rather large numbers
of plates, plus, the method often causes the water to drop down into the
space between the lid and the bottom making it unavailable for wetting the
seeds.  Any ideas?
Kath Archer

Kathleen Archer
Dept. Biology
Trinity College
Hartford, CT 06106

e-mail: kathleen.archer at
Ph:     (203) 297-2226

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