secret ballot

A monochrome 1891 photograph of men in a Michigan polling station using new wooden voting booths.
A monochrome 1888 photograph of a Massachusetts polling place featuring men in period attire and early wooden voting booths.
A black and white photograph of men in 19th-century attire waiting to vote in a room with wooden privacy booths.
A sepia-toned photograph of men in 1880s attire gathering outside a brick polling station in Indiana.
A 1889 sepia photograph of Montana voters gathered outside a wooden building to use the new secret ballot system.