The Popular Encyclopedia; or, Conversations Lexicon was a British encyclopaedia published by Blackie & Son, during the 19th century. It was originally based on the American Conversations Lexicon edition and translation, by Francis Lieber; which in turn was based on the German Conversations Lexicon in its 7th edition. The first editions were edited by Alexander Whitelaw, but the 1883 edition was led by Charles Annandale.
The 1836 version of the encyclopaedia was titled:
The Popular Encyclopedia being a general dictionary of arts, sciences, literature, biography, history and political economy. Reprinted from the American edition of the "Conversations Lexicon" with corrections and additions so as to render it suitable for [Britain] and bring it down to the present time. With dissertations On the rise and progress of literature, by Sir D. K. Sandford, D.C.L. M.P., On the progress of science by Thomas Thomson, M.D. F.B.S.L. & E. &c. &c. and On the progress of fine arts by Allan Cunningham, Esq.
An 1841 edition was published in Glasgow, in 7 volumes, royal 8vo, and edited by Alexander Whitelaw. The specific mention that it was originally an updated copy of an American encyclopaedia had been dropped, but the original name had been incorporated into the title:
The Popular Encyclopedia; or, "Conversations Lexicon" being a general dictionary of arts, sciences, literature, biography, history and political economy. With dissertations On the rise and progress of literature, by Sir D. K. Sandford, A.M., Oxon., D.C.L., On the progress of science by Thomas Thomson, M.D. F.B.S.L. & E. &c. &c. and On the progress of fine arts by Allan Cunningham, Esq.