Due to an editing mistake, the May 4 letter to the editor by Humphrey Tonkin, president of the University of hartford in Connecticut, contained and inaccuracy. The letter should have read: "As a primarily undergraduate institution, we do not make much use of graduate students as teachers...."
Letters are welcome. Only a selection can be published, subject to condensation, and none acknowledged. Please fax letters to (617) 450-2317 or address them to "Readers Write," One Norway St., Boston, MA 02115.