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We use glycerin in such small quantities mixed with the bubble solution for class. They have never been concerned. 

Janet Groenert 
Learning Experience Development 
Life Long Learning 
Science Museum of Minnesota 
phone; 651-221-4536 
fax:651-221-4528 
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When a teacher is an expert in a subject it is harder for them to understand the conceptual difficulties in the learners mind. Paraphrased from Eric Mazur 




----- Original Message -----
From: "Alissa Daniels" <[log in to unmask]> 
To: [log in to unmask] 
Sent: Tuesday, October 18, 2011 2:51:10 PM 
Subject: glycerin part II 

ISEN-ASTC-L is a service of the Association of Science-Technology Centers 
Incorporated, a worldwide network of science museums and related institutions. 
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thanks for the suggestions so far. 

my next question is really from my facilities manager who wants to know if it has any negative effects on your drain system. 


many thanks! 
AD 

~~~~~~~~~~~~~~~ 
Alissa Daniels, Science Program Manager 
Boston Children's Museum 
617 426 6500 .342 
"The most exciting phrase to hear in science, the one that heralds new discoveries, is not "Eureka!" (I found it!) but "That's funny..." " --Isaac Asimov 
~~~~~~~~~~~~~~~ 

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