Edgar Meritt Douglass, 74, a principal at Montgomery Blair High School in Silver Spring for 17 years, died Sunday in a Dade City, Fla., hospital following a heart attack.

Born in Fairfield County, S.C., Mr. Douglass came to the Washington area in the early 1920 and joined the Montgomery County School system as a teacher at Takoma-Silver Spring High School. He transferred in Montgomery Blair High School in 1929, and became its first principal.

In 1946, Mr. Douglass was named assistant superintendent of schools for Montgomery County, and later became acting superintendent until he retired in 1961.

At that time he joined the Washington sales office of Field Enterprises Educational Corporation, which sells the World Book Encylopedia. He retired in 1967 and then moved to Dade City.

Mr. Douglass was a member of Prudence Lodge of the Masons and a former president of the Silver Spring Lions Club.

Survivors include his wife, Hazel, of the home in Dade City; a won, Charles G., of Jacksonvillel, Fla.; a sister, Inez Duehring, of Silver Spring, and five grandchildren.

The family requests that expressions of sympathy be in theform of contributions to the scholarship fund of Pasco Heform of contributions to the scholarship fund of Pasco Herando Community College Foundation, Dade City.