Mrs. Sisk dies? rites in VirginiaPURCELLVILLE, Va. - Mrs. Dorothy Schurman Sisk, 71, youngest daughter of Jacob Gould Schurman, the third president of Cornell University, died Monday in her sleep at her home here.AAmMA ^Fl«A-N«nin T Anltvrasjr-atal*h.her.t./aA private memorial service will be conducted today in Purcellville, Va. The Mall Funeral Home of Purcellville is in charge of arrangements.Memorial contributions may be made to the Herbert F. Johnson Museum of Art.Mrs. Sisk was born in Ithaca and attended Ithaca schools. She is a graduate of the Rosemary Hall School of Connecticut and also attended Bryn Mawr College. She was a member of the Tower Club and the Friends of the Herbert F. Johnson Museum of Art at Cornell.She is survived by two sons, James Marshall McHugh Jr. of New York City and George Michael McHugh of Ithaca; two daughters, Mrs. John Owen of Marshall, Va., and Suzanne Schurman of Arlington, Va.; and nine grandchildren.