Station interiors; tunnels; platforms Huntington Avenue - Underpass construction - 1939-1941 Lindall place - 1987 East Boston Station; includes view of Atlantic Avenue station Escalators, ca. 1950s; Transit system users; Some exterior views East Boston extension: Blue Line to Revere - view of right-of-way Blue Line: East Boston extension to airport, East Boston construction and progress views Survey and construction views - aerials 1907, 1930s, 1950s Construction of elev. line/station - Cambridge bridge 1911 Beacon Hill tunnel and Park Street Under station - 1911-12 architectural and construction views Riverside line - stations - primarily architectural views; some people, facilities 1950s-1960 Riverside line - connector at Boylston street with views of Kenmore Square area, Brookline Avenue, 1950s Riverside line - views of backyards, rear views of suburban housing - ca.1958 Riverside line - track, abutments; 1958 Riverside line - Views along Riverside line Riverside line - progress/construction views 1959-60 opening of Riverside Vehicles - Rolling stock; passenger cars Sullivan Square station: construction views progress + completion [1946-52] undated Sullivan Square progress views - August-October 1946 Sullivan Square - Progress and completion views - November-December 1946 Vehicles - ca. 1940s-1960s (possible some earlier) New Albany Street Garage Emergency exits - State, Scollay, Adams Square, etc. Park Square - Copley Square, including aerial views - 1959 Mystic piers - Everett drawbridge - views of ships, harbor, drawbridge - 1947 Mystic piers - Everett drawbrige - details of piers Vehicles - equipment (road operated) for transit maintenance Vehicles - Varied types of vehicles operating on tracks (maintenance) South Station - Exterior views and construction South Station - Interior views Atlantic Avenue Line - Overhead track removal - May 1942 Boston - Atlantic Avenue Line - Overhead track removal - May 1942 Boston - Atlantic Avenue Line - Overhead track removal - June 1942 Atlantic Avenue Line - Overhead track removal - April 1942 Atlantic Avenue Line - Overhead track removal - April 1942 Atlantic Avenue Line - Overhead track removal - March 1942 Cambridge - Street surveys - including Radcliffe vicinity, Alewife area - 1942 Eagle Street - 1952 Green line - Gravel track, a few workmen - 1974 Garages - Bartlett Street - 1929-35 Garages - 1920s-1940s East Cambridge viaduct - structural details Forest Hills terminal - 1933,1936,1939,1957 Charles Station/Charles Circle - construction, completion, paranoramic views of surroundings - 1931-1932 Mystic river bridge - details of granite piers; some working views Science Park Bridge (Lechmere) - Some street views, panoramas - 1955 South Station Under - Construction/Progress views - 1954-56 Revere Extension - Composite photos - ca. 1950s-early 1960s Aerial Views over Boston, Revere - 1950s-1960s Parking lots (MBTA) - Panoramic views, buildings, cars - 1935;1941;1954-58