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The cent symbol is where it always has been ASCII &H162.....
Reagan Cole
Durham, Nc
-----Original Message-----
>From: Janet Groenert <[log in to unmask]>
>Sent: Aug 16, 2007 5:46 PM
>To: [log in to unmask]
>Subject: Re: Quick Crystals
>
>ISEN-ASTC-L is a service of the Association of Science-Technology Centers
>Incorporated, a worldwide network of science museums and related institutions.
>*****************************************************************************
>
>Oh i forgot one were we coat a slide with a thin emulsion of soap and
>then add a solution of sodium borate and watch it crystalize under
>the hot light of a microscope.
>
>
>At 12:50 PM 8/16/2007, you wrote:
>>ISEN-ASTC-L is a service of the Association of Science-Technology Centers
>>Incorporated, a worldwide network of science museums and related institutions.
>>*****************************************************************************
>>
>>When we had Strange Matter here a couple of years ago, I used Epsom
>>Salts (Magnesium Sulphate) to form crystals rapidly.
>>
>>We dissolved as much of the salt as we could in water warming on a
>>hotplate, and then dropped the solution on the surface of an old
>>fashioned overhead projector. The crystals formed instantaneously and a
>>whole room had a great view on a screen as the crystals formed.
>>Afterwards, you could lift the transparency sheet and pass it around and
>>to see the crystals up close.
>>
>>We were planning to use this as a floor demo but keeping the solution
>>hot enough was a problem - we were very concerned the public might get
>>burned. It worked well in volunteer training, and I could see it working
>>in a classroom.
>>
>>-----Original Message-----
>>From: Informal Science Education Network
>>[mailto:[log in to unmask]] On Behalf Of Jane Snell Copes
>>Sent: Thursday, August 16, 2007 10:33 AM
>>To: [log in to unmask]
>>Subject: Re: Quick Crystals
>>
>>ISEN-ASTC-L is a service of the Association of Science-Technology
>>Centers
>>Incorporated, a worldwide network of science museums and related
>>institutions.
>>************************************************************************
>>*****
>>
>>I would avoid naphthalene either in solution or sublimed and
>>recrystallized. Here's a link to MSDS, indicating moderate health
>>and flammability hazard. OSHA exposure limit is 10 ppm, which is
>>quite low. If you can smell it, you're likely above the limit.
>>http://www.sciencestuff.com/msds/C2149.html
>>
>>Sodium acetate and sodium thiosulfate 5-hydrate are both less toxic
>>and can actually be reused. That's my 2 cents' worth. Do you
>>realize computer keyboards no longer have a cent sign? Jane
>>--
>>Jane Snell Copes Science Outside the Box 651-357-3316 (cell)
>>
>>Science Outside the Box is a tiny business that celebrates the
>>scientist in every one of us. I am a writer and teacher, and I have
>>fun with science every single day. I'm especially fond of designing
>>classes and science magic shows for kids and parents.
>>
>>"To be an inventor, you need a good imagination and a big pile of
>>junk." Edison
>>
>>***********************************************************************
>>For information about the Association of Science-Technology Centers and
>>the Informal Science Education Network please visit www.astc.org.
>>
>>Check out the latest case studies and reviews on ExhibitFiles at
>>www.exhibitfiles.org.
>>
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>>For information about the Association of Science-Technology Centers
>>and the Informal Science Education Network please visit www.astc.org.
>>
>>Check out the latest case studies and reviews on ExhibitFiles at
>>www.exhibitfiles.org.
>>
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>>--
>>BEGIN-ANTISPAM-VOTING-LINKS
>>------------------------------------------------------
>>
>>Teach CanIt if this mail (ID 3834445) is spam:
>>Spam: http://canit.smm.org/canit/b.php?i=3834445&m=5438d4adc049&c=s
>>Not spam: http://canit.smm.org/canit/b.php?i=3834445&m=5438d4adc049&c=n
>>Forget vote: http://canit.smm.org/canit/b.php?i=3834445&m=5438d4adc049&c=f
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>
>Janet Groenert
>Science Camps Coordinator
>Science Museum of Minnesota
>120 W. Kellogg Blvd.
>St. Paul, MN 55102
>phone: (651)221-4536
>fax: (651)221-4528
>email: [log in to unmask]
>Check out our summer camp catalogue at
>http://www.smm.org/learn
>
>***********************************************************************
>For information about the Association of Science-Technology Centers and the Informal Science Education Network please visit www.astc.org.
>
>Check out the latest case studies and reviews on ExhibitFiles at www.exhibitfiles.org.
>
>The ISEN-ASTC-L email list is powered by LISTSERVR software from L-Soft. To learn more, visit
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>[log in to unmask]
***********************************************************************
For information about the Association of Science-Technology Centers and the Informal Science Education Network please visit www.astc.org.
Check out the latest case studies and reviews on ExhibitFiles at www.exhibitfiles.org.
The ISEN-ASTC-L email list is powered by LISTSERVR software from L-Soft. To learn more, visit
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