Black and white lantern slide of a sailing vessel at the Lunenburg shipyard, Nova Scotia.

Black and white lantern slide of St. Peter's Lock on Bras d'Or Lake, Nova Scotia.

Black and white lantern slide of a ship drydocked in Bay of Fundy, Nova Scotia.

Black and white photograph of a New York City tunnel through rock along the Hudson River.

Black and white photograph of a ladder with two adjustable legs over a measuring grid square on sand. Part of a camera ladder rig system developed by Merrill for taking overhead photographs of archaeological excavations. A cottage is visible behind…

Black and white photograph of a ladder with two adjustable legs over a measuring grid square on sand. Part of a camera ladder rig system developed by Merrill for taking overhead photographs of archaeological excavations. A cottage is visible behind…

Black and white photograph of Obsidian Cliff, Yellowstone National Park. Water damage is visible on the image, which was scanned from the negative.

Black and white photograph of a rocky creek bed with a field visible behind several bushes and a tree, likely taken near Coeymans, New York.

Black and white lantern slide copy of a sketch of petroglyphs on Table Rock, as traced in 1850, from an unknown source.

Black and white lantern slide of glacial grooves and a measuring stick on Kelleys Island, Ohio.

Black and white lantern slide top-down view of glacial grooves on Kelleys Island, Ohio.

Black and white lantern slide of Robert Merrill standing in a 6-foot deep glacial groove with a measuring stick on Kelleys Island, Ohio.

Black and white lantern slide of Moundbuilders Park in Newark, Ohio.

Black and white lantern slide of tree-covered mounds near Newark, Ohio.

Black and white lantern slide of mounds at Mound City National Park in Chillicothe, Ohio.

Black and white lantern slide of Serpent Mound, 16 miles southeast of Hillsboro, Ohio.

Black and white photograph of piers at Olcott Beach, Burt, New York.

Black and white photograph of Olcott Beach west, Burt, New York.

Black and white photograph of an old church in Tadoussac, Québec. Multiple horse-drawn carriages can be seen stopped in front of the church fence, and several people are standing on the church steps.

Black and white photograph of the Old Faithful geyser in eruption, Yellowstone National Park.

Black and white photograph of a crowd of people watching Old Faithful erupt in Yellowstone National Park (mile 17649.)

Black and white lantern slide of a masonry arch bridge over a waterway in Old Panama.

Black and white lantern slide of a staircase in a ruined Cathedral tower in Old Panama.

Black and white close-up photograph of an ancient Native American clay pipe found in Olivet, Michigan.