1. Infant in a "visual cliff" experiment Collection: Images from the Rare Book and Manuscript Collections Date: Unknown Format: Image Agent: Unknown
2. Infant on the "visual cliff" Collection: Images from the Rare Book and Manuscript Collections Date: Unknown Format: Image Agent: Unknown
3. Nurse with two children Collection: Highlights from Cornell University's Photography Collections Set: Labor and Work Inequality and legacies of discrimination Date: ca. 1860 Format: Image Creator: Unknown
