ISEN-ASTC-L is a service of the Association of Science-Technology Centers
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Wendy,

If you are describing a fossil dig exhibit, you probably want to use a
paraffin, sand and small gravel mix. We use this in our small fossil dig
exhibit. I can't remember the recipe off the top of my head, but can find it
for you. Be careful melting the paraffin; you'll need to use a double-boiler
to melt it so it doesn't combust. Also, too much paraffin makes it difficult
to dig.


Rob Fox
Associate Director/Director of Education
Da Vinci Science Center
3145 Hamilton Blvd. Bypass
Allentown, PA 18103
484-664-1002 x116
http://www.davinci-center.org
-----Original Message-----
From: Informal Science Education Network
[mailto:[log in to unmask]] On Behalf Of Wendy Derjue-Holzer
Sent: Thursday, January 03, 2008 11:06 AM
To: [log in to unmask]
Subject: matrix for fossil dig

ISEN-ASTC-L is a service of the Association of Science-Technology Centers
Incorporated, a worldwide network of science museums and related
institutions.
****************************************************************************
*

Dear resourceful listserv members,

Can someone send me a recipe for a plaster of paris/sand matrix to use 
in our investigation cart "fossil dig"? The previous education director 
developed this fun activity but did not leave the recipe for the matrix 
(at least in all the places I looked). At present our fossils have 
already been "dug" so we need to freshen up and re-bury our fossils.

Thanks,
Wendy

-- 
Wendy Derjue-Holzer
Assistant Director of School and Teacher Programs
Harvard Museum of Natural History
(617) 495-5782
www.hmnh.harvard.edu

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