1. Experiment on dog to see salivating upon stimuli Collection: Early 20th Century Engineering Lantern Slides Set: H. I. M. (Human Interaction Management) Date: undated Format: Image Agent: unknown
2. Mosso-Ergograph (after H. Lehmann), a devise used to measure muscle fatigue and work capacity from repeatedly moving a finger. Collection: Early 20th Century Engineering Lantern Slides Set: H. I. M. (Human Interaction Management) Date: 1880s Format: Image Agent: unknown
3. Portrait of a middle-aged man in regards to man's development. Artist is Carl Bohnen, 1871-1951. Collection: Early 20th Century Engineering Lantern Slides Set: H. I. M. (Human Interaction Management) Date: undated Format: Image Agent: unknown
4. Portrait of a young man in regards to man's development. Artist is Carl Bohnen, 1871-1951. Collection: Early 20th Century Engineering Lantern Slides Set: H. I. M. (Human Interaction Management) Date: undated Format: Image Agent: unknown
5. Portrait of an older man in regards to man's development. Artist is Carl Bohnen, 1871-1951. Collection: Early 20th Century Engineering Lantern Slides Set: H. I. M. (Human Interaction Management) Date: undated Format: Image Agent: unknown
