The Meta-Encyclopedia

The Meta-Encyclopedia

Search 25,744 entries from six encyclopedias published between 1892 and 1921. Where they overlap, their accounts sit side by side.

Browse A–Z · the single-source entries

Most widely covered

Palladium

5 encyclopedias

Annealing

4 encyclopedias

Asbestos

4 encyclopedias

Bed

4 encyclopedias

Bismuth

4 encyclopedias

Circe

4 encyclopedias

Corundum

4 encyclopedias

Diamond

4 encyclopedias

Medea

4 encyclopedias

Onyx

4 encyclopedias

Opal

4 encyclopedias

Sapphire

4 encyclopedias

Silver

4 encyclopedias

Brass

4 encyclopedias

Copper

4 encyclopedias

India

4 encyclopedias

Paris

4 encyclopedias

Steel

4 encyclopedias

Achilles

3 encyclopedias

Adonis

3 encyclopedias

Africa

3 encyclopedias

Agamemnon

3 encyclopedias

Agate

3 encyclopedias

Ajax

3 encyclopedias

Rights & ReuseThe six encyclopedias reproduced here were published between 1892 and 1921 and are in the public domain in the United States — like all works published before 1928 — and are free to read, quote and reuse. The text is reproduced as printed; the arrangement, comparison and editorial apparatus of this edition are © 2026 PhotoOpAI.