6 glass plates for projection, indigenous peoples

Set of 6 glass plates intended for the projection (ancestor of slides) of the house of the good press -paris. The subject is based on indigenous peoples around the world (late 19th to early 20th century) (central africa, middle east, asia, native american india (the tribe of the crees), arctic circle (people of the nation of the lands), the first christians of hudson bay...) A cracked plate in a corner which does not reach the photo itself.