1917. "Census Bureau, Department of Commerce, tabulating machine." An early punch-card tabulator, a distant forebear of today's computers. Two photos of this monster yet to come. Harris & Ewing Collection glass negative. View full size.

"1916. German sailor interned in U.S." A sailor from the cruiser Prinz Eitel Friedrich, interned along with the Kronprinz Wilhelm, their crews and a menagerie of mascots at Norfolk, Va., in 1915. Harris & Ewing Collection. View full size.

"Miss Mary E. Patton. Dog Show, 1915." One of many images from the Washington dog show of 1915 showing fancy canines and their even fancier owners, all of them female for some reason. Harris & Ewing Collection glass negative. View full size.

1921. The Trevor family's trip through the western United States. From the John B. Trevor collection. More here. View full size.

Washington, D.C., in 1913. "Baseball, professional. St. Louis players." Harris & Ewing Collection glass negative, Library of Congress. View full size.

Richmond, Virginia, circa 1905. "Main Street from Eleventh." 8x10 glass negative, Detroit Publishing Co. View full size. An earlier (and lower) view here.

"Untitled circa 1910-1917." Who is this boho hobo -- a tramp with a literary bent who did well in track and field? We do know that he's standing outside Bryan's Lunch Room (George F. Bryan, proprietor) at 101 B Street S.E. in Washington. Something else we know: Bryan's had a duckpin bowling team in the Capitol Hill league. Harris & Ewing Collection glass negative. View full size.

Untitled circa 1916. It was love at first sight. (The girl looks strangely familiar. Have we seen her before?) Harris & Ewing Collection glass negative. Update: This photo appeared in the October 1916 issue of Popular Science with the caption "Preparing to examine an employee in the United States Treasury Department to determine the effect of work on the eyes." View full size.