Design and Demonstration:

• Gerald Zweerink, Missouri Western State College, Saint Joseph, MO 64507

Video production:

• Jerrold J. Jacobsen, University of Wisconsin - Madison, Madison, WI 53706

• Gerald Zweerink
• David Phillips, Wabash College, Crawfordsville, IN 47933

---

© 1997 Division of Chemical Education, Inc., American Chemical Society. All rights reserved.