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Hi Jonah, 
A decent set of instructions is here:
http://www.spusps.com/index.php?option=com_content&task=view&id=13&Itemid=48
We have a similar setup that uses tiny Styrofoam balls in an enclosed glass tube, and the Exploratorium had one which used mineral oil.  But fire is way cooler, obviously.  I bet this would be a favorite at Burning Man.

Your original link to youtube was broken, here's another: http://www.youtube.com/watch?v=76flBsXXggg

David Perry | Lead Educator, Vernier Technology Lab
Oregon Museum of Science and Industry
Phone: 503-797-4585
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Date:    Fri, 2 Feb 2007 10:12:33 -0500
From:    Jonah Cohen <[log in to unmask]>
Subject: A Song of Fire

ISEN-ASTC-L is a service of the Association of Science-Technology Centers
Incorporated, a worldwide network of science museums and related institutions.
*****************************************************************************

I'm looking into some demos on sound, and unsurprisingly was intrigued
by the Ruben's Tube, a contraption hat displays sound waves using fire,
as seen in this video:

=20

http://www.youtube.com/watch?v=3DUR8rZMKlIq4

=20

A quick google check reveals many similar videos, but little info. Does
anyone have any schematics for building one, tips for usage/safety/how
it works? We're hoping to build a version portable enough for outreach.

=20

Thanks.

=20

Jonah Cohen

Outreach & Public Programs Manager

The Children's Museum

=20

"On blind faith they place reliance,

what we need more of is science"

           -MC Hawking

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