Authoritytgm005803
https://www.loc.gov/pictures/collection/tgm/item/tgm005803
tgm005803Scope NoteHand-drawn, painted, or photographic images on glass, intended for viewing by projection; often made in sets. Photographic lantern slides were introduced in the United States by 1850 and popular through World War I; commonly 3.25 x 4 in. (9 x 10 cm.) with a black paper mask, a cover glass, and taped edges.
