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C. CLAIBORNE RAY Readers are invited to submit questions by postal mail to Questions, Science Times, The New York Times, 229 West 43d Street, New York, N.Y. 10036-3959, or by E-mail to:

Readers are invited to submit questions about science to Questions, Science Times, The New York Times, 229 West 43d Street, New York, N.Y. 10036.