1918 slackers: The check dodger, car seat caretakers, the parlor slacker, slackerette and planting a grandmother. Perhaps someone could explain that last one. View full illustration.

Available as a Juniper Gallery Fine-Art Print, "Fate of the Rebel Flag" is the second of a pair of patriotic lithographs with a militantly Unionist theme based on paintings by William Bauly and issued by New York art publisher William Schaus in September 1861 at the start of the Civil War. In a spectacular nocturnal scene, a large warship sinks and burns, the flames taking on the configuration of the first flag of the Confederacy, the blue field with seven stars being formed by the night sky. Lightning strikes the flag from the upper left. View full size.

October 1909. "Late at night. Boston market. Many young venders." 5x7 glass negative by Lewis Wickes Hine. View full size.

October 1908. Digging coal by machinery at the Brown Mine in West Virginia. Note open-flame headlamps. View full size. Photograph by Lewis Wickes Hine.

1938 WPA silkscreen poster promoting oral hygiene. Artist unknown. Work Projects Administration Poster Collection. Now available as a print!

June 18, 1916. Sunday recreation at Sandy Beach for mill boys ages 14-16. Fall River, Massachusetts. View full size. Photograph by Lewis Wickes Hine.

Mill boys showing off at Sandy Beach. June 1916. Fall River, Massachusetts. View full size. Photo by Lewis Wickes Hine. What else are these boys up to? Read on.

June 1916. "Pick-up at Sandy Beach merry-go-round. Girls are 14-16. Wearing short dresses." View full size. Photograph by Lewis Wickes Hine.

June 1916. A Sunday afternoon "pick-up" at Sandy Beach. Girls about 15. Fall River, Massachusetts. View full size. Photograph by Lewis Wickes Hine.

June 1916. Sandy Beach near Fall River, Massachusetts. "Two girls in foreground about 15. Mr. Tebbutt says dance hall bad conditions. Penny picture machine attracting crowds." View full size. Photograph by Lewis Wickes Hine.

September 1908. Young mule drivers and trapper boy at the Brown Mine near Brown, West Virginia. Underground from 7 a.m. to 5:30 p.m. View full size.

June 1942. Construction work at the Tennessee Valley Authority's Douglas Dam. View full size. 4x5 Kodachrome transparency by Alfred Palmer.

When Teacher's away, the boys will play. Posed mayhem from St. Louis photographer Fitz W. Guerin. View full size.

A well-rounded young lady in dancing costume as photographed in the studio of Fitz Guerin in 1902, the year before his death. View full size.

Chesapeake & Ohio M-1 steam turbine 502 at Cincinnati on July 2, 1949. These coal-fired turbine locomotives were complete failures in passenger service despite their impressive size and complexity. Built in 1947 by Baldwin Locomotive for exorbitant prices, all three were retired by 1950. Color of this engine, in case you're wondering, was yellow-orange up top with gray beneath, with dark blue lettering and trim. View full size.