Be it enacted by the Senate and House of Representatives of the United States of America in Congress assembled, That the Secretary of the Navy is authorized and directed to cause to be made at the United States mint such number of gold, silver, and bronze medals of appropriate design as he may deem appropriate and necessary, to be presented to members of the United States Antarctic Expedition of 1939–1941, in recognition of their valuable services to the Nation in the field of polar exploration and science.