"Immigrant children learning to play on the roof garden of the Washington School in Boston." October 1909. View full size. Photograph by Lewis Wickes Hine.

Student at vocational school in Buffalo, New York. February 1910. View full size. Photograph by Lewis Wickes Hine.

"A Winning Miss" in 1911. Art Photo Co., Grand Rapids, Mich. View full size.

"Eight-year old Jack driving horse rake. A small boy has difficulty keeping his seat on rough ground and this work is more or less dangerous." August 1915, western Massachusetts. View full size. Photograph by Lewis Wickes Hine.

June 1942. "Big Pete" Ramagos, a rigger at work on the TVA's Douglas Dam in Tennessee. View full size. 4x5 Kodachrome transparency by Alfred Palmer.

New York playground c. 1910. View full size. Geo. Grantham Bain collection.

A dead but picturesque pine tree frames this view of Moreno Valley in Colfax County, New Mexico. February 1943. View full size. 4x5 Kodachrome trans- parency: John Collier, Farm Security Administration/Office of War Information.

Circa 1905. "Tramps fighting on R.R. train -- Get down and hit the grit." Bain News Service reproduction of a Brown Bros. print. View full size.

A springtime carpet of dandelions and daisies in Vermont, June 1943. View full size. 4x5 Kodachrome transparency by John Collier. I see clover and daisies, but nothing that looks very dandeliony to me. Are the orange flowers dandelions?

Preparing a model of the B-25 bomber for the wind tunnel at North American Aviation's plant at Inglewood, California. October 1942. The model maker holds an exact miniature reproduction of the type of bomb the plane will carry. View full size. 4x5 Kodachrome transparency by Alfred Palmer.

Preparing for Circus Week at Madison Square Garden, New York. March 21, 1913. 5x7 glass plate negative, George Grantham Bain Collection. View full size.

"Vacation Circus," circa 1915. View full size. George Grantham Bain Collection.

Carnegie Playground, Fifth Avenue, New York. Circa 1910. View full size. 5x7 glass negative, George Grantham Bain Collection, Library of Congress.

New York playground c. 1910. View full size. Geo. Grantham Bain collection.

New York playground c. 1910. View full size. Geo. Grantham Bain collection.