Cornelius Van Schaak Roosevelt, CIA

WASHINGTON - Cornelius Van Schaak Roosevelt, a grandson of President Theodore Roosevelt and former Central Intelligence Agency official, died Aug. 2 of a heart attack in his home. He was 75.

Mr. Roosevelt was also an engineer and business executive who worked in China, an art collector and amateur archaeologist. A Navy veteran, he had traveled the world from Haiti to the Red Sea as a scuba instructor.

A native of New York, he attended Harvard University and graduated from the Massachusetts Institute of Technology. He joined the CIA in Washington in 1952.

He became chief of the CIA's Technical Services Division and later chairman of the committee for technical-surveillance countermeasures, whose role was to thwart electronic eavesdropping. He retired from the CIA in 1973.