Waltham - Mr. John T. Smith, Jr. of Waltham died Thursday, April 7, 2005 at his home. He was 73. Born in Boston, a son of the late John T. and Mabel (Billings) Smith, he had lived in Waltham for most of his life. Until his retirement he worked for many years for the City of Waltham Street Department. During the Korean War, he served with the U.S. Air Force. The husband of the late Mary A. (Dwyer) Smith, he leaves one sister, Helen E. McNicholas and her husband Michael of Woburn and two nephews, Michael McNicholas of Tampa, FL and John McNicholas of Plymouth. Relatives and friends are invited to attend the Funeral at 8 a.m. Monday from The Joyce Funeral Home, 245 Main Street (Rte. 20), Waltham followed by a Funeral Mass in Saint Mary's Church, 133 School Street, Waltham at 9 a.m. Burial will be in Mount Feake Cemetery, Waltham. Visiting hours are Sunday from 2 to 5 p.m. Memorial donations may be made to Saint Jude Childrens Research Hospital, 501 Saint Jude Place, Memphis, TN 38105-1942.