A pedigree was part of a eugenical case study done by Margaret Kesler, a student in the 1920 summer course at the Eugenics Recod Office. The subject of the study was a fellow student in the course.

229. Reactions to the thought of killing the following organisms. Mosquito - Joy Beetle - Indifference or possibly a shudder at the crunching sound. Earthworm - Indifference Fish - Indifference Small Snake - (harmless) Pleasure Squirrel - Revulsion - pity Chicken - Indifference - possibly slight revulsion at seeing it hop around afterwards. cat - Revulsion - Feeling of cruelty dog - Grief - probably the action would make me feel depressed for some time. cow - revulsion Human criminal - Horror - probably an inability to forget it and a tendency to feel that he might not have been a criminal