Columbia subject headings:
Cosmology--Early works to 1800.
Descartes, René, 1596-1650.
Metaphysics--Early works to 1800.
Nature--Early works to 1800.
Spirit--Early works to 1800.
Harvard subject headings:
Cosmology--Early works to 1800
Descartes, René, 1596-1650.
Metaphysics--Early works to 1800
Nature--Early works to 1800.
Spirit--Early works to 1800.
Princeton subject headings:
Descartes, René, 1596-1650.
Metaphysics--Early works to 1800.