temperature sensitive film

[Carl Pike]

Many years ago i purchased such material from Edmund Scientific. 
They had several versions, each changing temperature over a different 
range.  It was a fairly effective demonstration.  You can compare 
narrow and broad leaves, dissected leaves, etc.  I think these are 
liquid crystal materials, of the sort used in the fever thermometers 
you stick on your forehead.
-- 
Carl S. Pike
Harry W. and Mary B. Huffnagle Professor of Botany
Department of Biology                Phone (717) 291-3958
Franklin and Marshall College        email C_PIKE at ACAD.FANDM.EDU
P.O. Box 3003                        fax (717) 358-4548
Lancaster, PA  17604-3003  USA

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