_http://upstagereview.org/StagecraftArticles/fogsafe.pdf_ 
(http://upstagereview.org/StagecraftArticles/fogsafe.pdf) 
a web site describing safety issues relating to fog machines for theatrical  
use.
 
_http://www.hse.gov.uk/pubns/etis3.htm_ 
(http://www.hse.gov.uk/pubns/etis3.htm) 
a web site with a safety data sheet re use of somke effects including fog  
machines
 
Although both sites are concerned primarily with health effects on people,  
they contin useful warnings.
I have NO practical experience with this material but the warning are  enough 
to suggest that this should not be used in a museum. -- just an  opinion
 
Barbara Hass, retired librarian
 

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