Washington, D.C., circa 1901. "View of 21st Street N.W., east side, looking north from E Street, with dairy cart at the curb in front of a corner shop." 5x7 inch glass negative. View full size.

Washington, D.C., circa 1901. "Businesses on F Street N.W., north side, between 12th & 13th Streets, Nos. 1201-1219." 5x7 glass negative, D.C. Street Survey Collection. View full size.

Washington, D.C., circa 1901. "View of E Street N.W., south side, looking west from 12th Street." 5x7 inch glass negative, D.C. Street Survey Collection. View full size.

        Back when you could leave your ice-wagon at the blacksmith's unlocked.

Washington, D.C., circa 1901. "View of E Street S.W. between Delaware Avenue & First Street, looking northwest." 5x7 inch glass negative, D.C. Street Survey Collection. View full size.

Washington, D.C., circa 1901. "View of Seventh Street S.W., between I & H, looking west to northwest showing rowhouses obscured by tree-lined street and steeple of St. Dominic's partially visible." 8x10 inch glass negative, D.C. Street Survey Collection. View full size.

Washington, D.C., 1901. "View of 13th Street N.W., west side, looking south from H Street." One-stop shopping for all your cooking and heating needs, as well as a trifecta of sidewalk bread lockers. 5x7 inch glass negative, D.C. Street Survey Collection. View full size.

September 1901. Washington, D.C. "View of G Street N.W., north side on right, looking west from 13th Street." 5x7 inch glass negative, D.C. Street Survey Collection. View full size.

        Almost 40 years later, a view of the back yards last seen here.

Washington, D.C., 1939. "A view of backyards of apartment houses where both white and Negro families are living." 35mm nitrate negative by David Moffat Myers. View full size.

Washington, D.C., circa 1901. "An elevated view of rowhouses, probably in S.W., showing laundry hanging on clotheslines in back yards." Also Mr. Upstairs keeping an eye on Miss Downstairs. 5x7 inch glass negative, D.C. Street Survey Collection. View full size.

Washington, D.C., circa 1901. "Virginia Avenue at Sixth Street S.W., showing street and railroad tracks in the foreground near the Adams Express Co., and the Washington Monument in the distance." 5x7 inch glass negative, D.C. Street Survey Collection. View full size.

Washington, D.C., circa 1901. "View of Grace Alley S.W., between D & E and 8th & 9th streets, looking west." Our first look at some of the approximately 200 circa 1900-05 glass negatives comprising the D.C. Street Survey Collection at the Library of Congress. View full size.

September 24, 1918. "5th Company, 161st Depot Brigade, Camp Grant, Illinois. Lieut. C.A. Geers commanding." Gelatin silver print by Hinkley Photo Co. of Rockford. View full size.

New York, 1932. "60 Wall Tower (70 Pine Street)." The former Cities Service Building. At 67 stories, the world's third tallest structure when completed in 1932. Now a residential tower with units renting from $2,500 to $7,000 a month. Irving Underhill photo. View full size.

1914. "Street railway scene. Business district of Rockford, Illinois." View full size.

Chicago circa 1917. "Rest period, Elizabeth McCormick Open Air School No. 2, on roof of Hull House boys club." Or, possibly, naptime on the set of "The Seventh Seal." View full size.

        The Open Air movement, which started in 1908 and ran through the 1930s, provided for the education of children with tuberculosis while at the same time crusading against "ventilating systems which do not ventilate." The movement (one subcategory of which was the "open window school") reflected a prevailing belief in the therapeutic powers of fresh air. Gelatin silver print by Burke-Atwell.