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At the Exploratorium Traits of Life, the tiger skin by Heather  
Achroyd and Dan Harvey, made by selectively-shading grass,  is a step  
beyond fantastic.  I'm remembering a portrait of a woman's face, in  
sod, hung vertically!, made the same way.  Really fantastic.

Some years ago, there was a website that had a webcam focused on a  
sprouting bud, lit by a computer monitor, actually hung from above,  
shining down.  Website visitors with webcams could send their own  
images to the monitor.  So people were aiming their webcams at the  
sky from wherever they were in the world, providing light for this  
sprout.  I kept tabs on it for a little while, but don't know what  
became of it in the end.
Eloquent idea...the light of the world, albeit spectrum-filtered by  
processors and a CRT!

--Jason


__
jasonJayStevens

exhibits . annArborHands-OnMuseum . [log in to unmask]
734.995.5439 x32

art . potterBelmarLabs . [log in to unmask]
www.potterbelmar.org

On Nov 2, 2005, at 12:53 PM, Peter A. Anderson wrote:

> ISEN-ASTC-L is a service of the Association of Science-Technology  
> Centers
> Incorporated, a worldwide network of science museums and related  
> institutions.
> ********************************************************************** 
> *******
>
> Olle, the Exploratorium has a good one;  a large
> fast-photosynthesizing leaf is sealed in a transparent
> chamber.  Air is passed over it and the output air goes
> througn a carbon dioxide analyzer (an automatic
> spectrophotometer).  Shortly after the visitor turns a
> strong light on the leaf, the carbon dioxide level falls
> as it is used up in photosynthesis.
>
> Of course, there are also waterweeds that have
> bubbles of oxygen on them, from photosynthesis.
>
> The actual process is a pretty complicated bit of
> natural organic chemistry, and difficult to put across.
>
> Good luck
>
> Peter Anderson
>
> ********************************************************************** 
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