A memorial tribute will be held on Wednesday, June 25, for

Mary Fieser, an associate of the Department of Chemistry and Chemical Biology, who died March 22 at the age of 87. The service will take place at 2 p.m. in the Pfizer Lecture Hall, 12 Oxford St., Cambridge; a reception will follow in the departmental library.

In November 1995, the department honored Fieser and her late husband, Professor Louis Fieser, by naming the undergraduate organic chemistry laboratory in the Science Center after them. For further information about the memorial tribute, call

495-4076.