Columbia subject headings:
Berkeley, George, 1685-1753.
Concept of spirit.
Hume, David, 1711-1776.
Locke, John, 1632-1704.
Spirit--History--18th century.
Harvard subject headings:
Berkeley, George, 1685-1753--Contributions in the concept of spirit.
Hume, David, 1711-1776--Contributions in the concept of spirit.
Locke, John, 1632-1704--Contributions in the concept of spirit.
Spirit--History--18th century.
Princeton subject headings:
Berkeley, George, 1685-1753.
Empiricism.
Hume, David, 1711-1776.
Locke, John, 1632-1704.