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Executive Director's Message: June Conference Continues to Shape Up     Design Your Experiments Part XIII: Other Experiment Designs By Kevin Kilty Techniques in Microbiology: Safety in Laboratories. World Health Organization Algorithms for Mental Conversions between the Fahrenheit and Celsius Scales by Robert A. Warren Science 'Toons by Brian Mansfield   Mind of a Theorist Coursing Through Mathematics by George Hrabovsky Adventures in Discovery "Reason" Takes a Lesson, Concluded by Art Winfree Chemistry Corner Hyposulfurous Acid and Hyposulfites by Norm Stanley Electronics for the Amateur Scientist Researching Electronics Information on the Web by Paul Dito     Valence and Oxidation State by Norm Stanley A Guide to Drying Agents     The latest products for SAS members.     The Clink function, scientific illiteracy, renegade microbiologists and more in E-Bulletin Backscatter.     Published weekly by: Society for Amateur Scientists 5600 Post Rd. Suite 114-341 East Greenwich, RI 02818 401-823-7800     Copyright 2000, 2001, 2002 by the Society for Amateur Scientists, all rights reserved.