Columbia subject headings:
Cryptography--Early works to 1800.
Cryptography.
Mechanics--Early works to 1800.
Mechanics.
Plurality of worlds.
Science--Early works to 1800.
Solar system.
Harvard subject headings:
Cryptography--Early works to 1800
Mechanics--Early works to 1800
Plurality of worlds
Plurality of worlds--Early works to 1800.
Science--Early works to 1800
Solar system
Princeton subject headings:
Cryptography--Early works to 1800.
Mechanics--Early works to 1800.
Plurality of worlds.
Science--Early works to 1800.
Solar system.