1. 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
2. Ergogram measuring physical fatigue after repeated motion. Collection: Early 20th Century Engineering Lantern Slides Set: H. I. M. (Human Interaction Management) Date: undated Format: Image Agent: unknown
