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Reprinted by permission of Dick Berg, University of Maryland, for use on this website.

The demonstrations contained and referenced herein are listed for the purposes of cataloging and describing physics demonstrations which should be conducted only under the direction of a trained instructional support professional or physicist. These demonstrations are not presented for the purpose of being conducted by persons unconnected to this Facility and/or persons not consulting with or being supervised by the recognized instructional support professional or physicist and his/her staff. The University is responsible only for those demonstrations carried out using its own equipment using established safety and scheduling policies, and bears no responsibility for those choosing to use this source material for their own purposes. All demonstrations described and contained herein are public domain, and can also be found in reference materials in libraries, bookstores, and electronic sources.

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A cool variation is to use two ice buckets.  Charge one bucket and then connect the outside surface of this bucket to the outside surface of the other bucket.  Each buckets will now have 1/2 the initial charge.  Now disconnect and recharge one of the buckets again.  This time connect the inside of the charged bucket to the outside of the uncharged bucket.  All of the charge from the first bucket will be transferred to the second bucket.