Box 12 Files: 77-1 American, 1951-1956 77-2 American, 1953-1956 77-3 British, 1951-1955 77-4 Canadian, 1945-1953 Box 13 77-5 Canadian, 1950-1952 77-6 Canadian, 1950-1955 77-7 Canadian, 1960 77-8 Infrared Spectrophotometer & Accessories, 1955-1960 77-9 Rudolph Polarimeter, 1958-1959 77-10 Miscellaneous, 1935-1947