What years would Lyman James Briggs have been the director of the National Bureau of Standards, if he was a  a director of the National Bureau of Standards during the Great Depression?
Great Depression The Great Depression was a severe worldwide economic depression that took place mostly during the 1930s, originating in the United States. The timing of the Great Depression varied across nations; in most countries it started in 1929 and lasted until 1941. It was the longest, deepest, and most widespread depression of the 20th century. In the 21st century, the Great Depression is commonly used as an example of how far the world's economy can decline.
United States Department of Labor The United States Department of Labor (DOL) is a cabinet-level department of the U.S. federal government responsible for occupational safety, wage and hour standards, unemployment insurance benefits, reemployment services, and some economic statistics; many U.S. states also have such departments. The department is headed by the U.S. Secretary of Labor.