The Popular Encyclopedia or Conversations Lexicon was a British encyclopedia that was published from 1837 to 1893 by Blackie and Son, of Glasgow. It was originally a reprint of Francis Lieber's Encyclopedia Americana, itself based on the Brockhaus Enzyklopädie. A new edition was published in 1841, this time omitting the reference to the Americana in the subtitle. Further seven volume editions were published in 1862 and 1877 under the editorship of Alexander Whitelaw. In 1882 the set was taken over by Charles Annandale whose edition of 1890-93 was expanded to 14 volumes.