Historical Editions of
THE ENCYCLOPEDIA BRITANNICA

First Edition
1768-1771
3 volumes
Second Edition
1777-1784
10 volumes
Third Edition
1788-1797; 1801 sup.
18 vol. + 2 sup.
Fourth Edition
1801-1809
20 volumes
Fifth Edition
1815
20 volumes
Sixth Edition
1820-23; 1815-24 sup.
20 vol. + 6 sup.
Seventh Edition
1830-1842
21 volumes
Eighth Edition
1852-1860
21 vol. + index
Ninth Edition
1875-1889
24 vol. + index
Tenth Edition
1902-1903
35 volumes
Eleventh Edition
1910-1911
29 volumes
Twelfth Edition
1921-22
11th Ed. + 3 sup.
Thirteenth Edition
1926
11th Ed. + 6 sup.
Fourteenth Edition
1929-1973
24 volumes
Fifteenth Edition
1974-1984
30 volumes
Fifteenth Edition, rev.
1985+
32 volumes