"Trinity Episcopal Church, 3rd & C & Ind. Ave." Unfinished Capitol in the background, circa 1863-64. View full size. Brady-Handy Collection.

Deadwood City Hall in 1890 shortly after its completion. Note fire wagons in garage, fire alarm and fire hydrant. The building burned to the ground in 1952. Those are electric arc lights mounted up near the belfry. View full size. Photograph by John C.H. Grabill.

October 1942. A painter cleans the tail section of a P-51 Mustang fighter prior to spraying with olive-drab camouflage. North American Aviation plant, Inglewood, California. View full size. 4x5 Kodachrome transparency by Alfred Palmer.

October 1942. Final assembly for a B-25 bomber at North American Aviation, Inglewood, Calif. View full size. Kodachrome transparency by Alfred Palmer.

October 1942. Cowling and control rods are added to motors for B-25 bombers as they move down the assembly line at North American Aviation, Inglewood, Calif. View full size. 4x5 Kodachrome transparency by Alfred Palmer.

February 1943. Readying a "Vengeance" dive bomber for landing gear installation at Consolidated-Vultee, Nashville. View full size. 4x5 Kodachrome transparency by Alfred Palmer.

Working on Catalina flying boat at the Corpus Christi Naval Air Base. August 1942. View full size. 35mm Kodachrome transparency by Howard Hollem.

Mating operation on a C-87 transport plane just before it comes to the pre- assembly line at the Consolidated Aircraft Corporation plant, Fort Worth, Texas. October 1942. View full size. Kodachrome transparency by Howard Hollem.

Fitting the tail of a C-87 transport plane to the wing center section in the fuselage mating fixture at the Consolidated Aircraft plant, Fort Worth, Texas. October 1942. View full size. 4x5 Kodachrome transparency by Howard Hollem.

Wing center section of a Liberator bomber at the Consolidated Aircraft plant. October 1942. View full size. Kodachrome transparency by Howard Hollem.

Medical classroom, American University of Beirut, Lebanon. Circa 1930s. View full size. (Warning - Not for the squeamish: See what's inside.)

Anatomy Class circa 1905. Location unknown. View full size. George Grantham Bain Collection.

New York, December 1924. "Greenwich Village Follies Cooking Class." George Grantham Bain Collection. View full size.

Cooking Class for Men at the Pratt Institute with Miss Hanks and Miss Kierstead, circa 1917. View full size. George Grantham Bain Collection.

Electricity Class at St. George's Evening Trade School, New York, circa 1910. View full size. George Grantham Bain Collection.