Slide showing diagrammatical drawings of five skeletons - 'Gibbon, Orang, Chimpanzee, Gorilla and Man'. Slide shows five black and white diagrammatical drawings of skeletons labelled left to right - 'Gibbon, Orang, Chimpanzee, Gorilla, Man'. Small round sticker in upper left corner handwritten label reads 'A/39'. Small round sticker in upper right corner handwritten label reads '11'. Number '108' written on tape at top of slide frame. Late 19th - early 20th century