- Andrew Jackson's Cradle
- Ann Pennington
- Another form of Drying Meat
- Another method Broiling Meat
- Another representation of the Elephant-headed Rain god
- Antique pipe from central America
- Antonio López de Santa Anna
- Apache and Sioux Scalps
- Apache Cradle
- Apples
- Appliance for developing the Sides of the Waist
- Applying pressure to leg wound
- Appropriate School Dresses
- Arms of George Washington
- Arrow Heads in the National Museum
- Arrow polisher
- As the man sat in his lodge, there came a clap of thunder and lightning struck his roof, tearing a great hole
- As we two girls sat on the floor, with ankles to the right, as Indian women always sit
- Assasination at Ford's Theatre
- At Close Quarters, on the first day at Gettysburg
- At Free and Easy Shows
- At one side of our field Turtle had made a booth
- At the Stage Entrance
- At the Theatres
- At this hour, fires burned before most of the tepees
- Attack on Brookfield.
- Augustus
- Austin, Nevada, six thousand feet above the sea
- Avery Hopwood
- Aztec cluster of bells
- Aztec drums
- Aztec whistles
- Baby-like, I ran my fingers through the shiny grain, spilling a few kernels on the floor
- Bailey's American Mowing Machine (1822)
- Baking Bread
- Baking Bread in Murray Bay
- Ballet dancer
- Ballet Dancer
- Ballet on stage
- Baltimore - A night skirmish at Eutaw Street
- Baltimore - Arrival of Gatling Guns at Camden Street Depot
- Baltimore - attacking the soldiers at the armory
- Baltimore - carrying off the dead rioters
- Baltimore - scene after the first volley by the Sixth Regiment
- Baltimore - the mob assaulting a member of the sixth
- Baltimore - The mob firing the Camden Street Station
- BAltimore - U.S. Artillery guarding the Camden Street Depot
- Basaltic Columns, Regia, Mexico
- Baskets
- Battle of Lake George
- Battle of Muddy Brook
- Battle of Palo Alto 8th. May 1846
- Battle of Resaca de la Palma 9th May 1846
- Battlefield scene
- Battles Around Atlanta
- Baxter's Mill
- Beaver Trap
- Beginning a Tunnel
- Behaim's Globe
- Being Poor