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