5.25x7x.5” deep box contains set c. 1900. Box reads “An Entirely Novel And Curious Optical Affect. Interesting To Scientists And Everyone. How Is It Done? Can You Study It Out? An Unfailing Source Of Amusement. Compliments Of Goodwillie Brothers Chicago.” Box contains 15 anaglyph prints on stiff card stock, each titled and numbered with “Goodwillie Brothers” imprint on top margin. Each creates a 3-D illusion when the accompanying red and green spectacles are worn by viewer. Apparently from an extensive numbered series randomly inserted in these boxes. Numbers in this set are 1, 2, 26, 30, 35, 36, 38, 42, 47, 52, 56, 72, 74, 89, 96. Some of the images include child pulling wagon containing dog, hobos, “Poker Sharks” featuring 2 black men, woman standing on chair looking down at a mouse, garden scenes, man in blackface, fishing, Lincoln Monument, “Captured Spanish Cruiser,” others. Box has noticeable aging/dust soiling and lid has one corner split. VG. Prints have varying degrees of aging and corner tip wear but are Fine to VF. Spectacles are Exc. Neat set.