Laurence E. Slade, 73, who retired from the World Bank in 1971 as chief of the graphic arts division after 25 years of service, died May 11 at Holy Cross Hospital in Fort Lauderdale, Fla., following a heart attack. He was a resident of Arlington and was vacationing at the time he was stricken.

Mr. Slade was born in England and spent his early childhood in Germany. He and his family returned to England after the outbreak of World War I in 1914. Because of British hostility toward Germany at that time, the family changed its name from Schlesinger to Slade.

Mr. Slade became an illustrator and cartoonist for several British newspapers, including the Times of London, the Manchester Guardian and the London Daily Telegraph.

He joined the British Army in World War II and was assigned to Washington in 1941. He rose to the rank of major and remained here after the war.

He joined the World Bank in 1946. In the same year, he established his own advertising service and continued this work unitl 1973.

His first wife, Milly, died several years ago.

Survivors include his wife, the former Dorothy Peggy O'Neil, of the home in Arlington; two sons, Graham, of Rileyville, Va., and Alan, of Alexandria; a brother, Manfred, of London, and three grandchildren.

The family suggests that expressions of sympathy be in the form of contributions to the Heart Association of Northern Virginia Inc. CAPTION: Picture, LAURENCE E. SLADE