Encyclopaedia Britannica

Originally published in Edinburgh by Adam and Charles Black; the trademark and publication rights were sold after the 11th edition to an American company, which is now the current publisher.

1th edition (1768-1771) - 3 vol.

2nd edition (1777-1784) - 10 vol.

3rd edition (1788-1797, 1801 sup.) - 18 vol. + 2 sup.

4th edition (1801-1809) - 20 vol.

5th edition (1815) - 20 vol.

6th edition (1820-1823, 1815-1824 sup.) - 20 vol. + 2 sup.

7th edition (1830-1842) - 21 vol.

8th edition (1852-1860) - 21 vol. + index

9th edition (1870-1890) - 24 vol. + index. It featured articles by notables of the day, such as James Maxwell on Electricity and Magnetism, and [William Thompson]? (who became Lord Kelvin) on Heat.

10th edition (1902-1903) - consisted of the ninth edition, plus 9 supplementary volumes with updates and additions, plus a maps volume and an index volume.

11th edition (1910-1911) - 29 vol. Considered the classic edition of Encyclopaedia Britannica; available in the public domain (see Britannica Public Domain).

12th edition (1921-1922) - 11th ed. + 3 sup.

13th edition (1926) - 11th. + 6 sup.

14th edition (1929-1973) - 24 vol.

15th edition (1974-1984) - 28 vol.

15th ed., rev. (1985-) - 32 vol.

The web site for Encyclopaedia Britannica is at http://www.britannica.com/

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Note that the brand (trademark?) name of this particular encyclopedia uses the British spelling, with "ae" (or "æ", which may not be available in some browsers).