"Semmes Motor Co. truck, 1926." A Dodge truck outside the Grand Central Palace pool hall in Washington, Pennsylvania Avenue and Seventh Street N.W. National Photo Company Collection glass negative. View full size.

"U.S. Army camp kitchen." Somewhere in the general vicinity of Washington, D.C., circa 1918. National Photo Company glass negative. View full size.

October 1905. The New Montauk theater in Brooklyn at Livingston Street and Hanover Place. Now playing: Sam Bernard as Schmaltz in the vaudeville comedy "The Rollicking Girl." Detroit Publishing Co. glass negative. View full size.

June 22, 1918, in or near New York City. "Miss May Schloss at canteen." 5x7 glass negative, George Grantham Bain Collection. View full size.

March 18, 1919. "Caruso and Muzio." Famed Italian tenor Enrico Caruso with the soprano Claudia Muzio in New York during his 15th year with the Metropolitan Opera and two years before his death. G.G. Bain Collection. View full size.

Under the Hudson River circa 1908. "Interior of car, N.Y.-N.J. Tunnel." Today this would be the PATH train. 8x10 glass negative, G.G. Bain. View full size.

"Miss Elizabeth Funk, 1917." Continuing our survey of Washington, D.C., professional women named Funk. Not sure exactly what Liz did or where she did it, but she looks like someone who knows her way around a Bunsen burner. Harris & Ewing Collection glass negative. View full size.