Columbia subject headings:
Animal intelligence.
Human beings.
Leroy, Charles Georges, 1723-1789--Correspondence.
Philosophy, French--18th century.
Harvard subject headings:
Animal intelligence
Human beings
Leroy, Charles Georges, 1723-1789--Correspondence.
Philosophy, French--18th century.
Princeton subject headings:
Consciousness in animals.
LeRoy, Charles-George, 1723-1789--Correspondence.