Under which number president did Arthur A. Ballantine become solicitor of the Internal Revenue Service?
Arthur A. Ballantine: Arthur A. Ballantine (1883–1960) was a 20th-century American lawyer, tax specialist, who became the first solicitor of the Internal Revenue Service and Undersecretary of the Treasury under U.S. President Herbert Hoover and later partner in what became the Dewey Ballantine law firm. Herbert Hoover: Herbert Clark Hoover (August 10, 1874October 20, 1964) was an American engineer, businessman, and politician who served as the 31st President of the United States from 1929 to 1933 during the Great Depression.
31st