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The London Encyclopaedia was a "universal dictionary of science, art, literature, and practical mechanics" published in London in 22 volumes in 1829 and 1837, and edited by Thomas Curtis (identified on the title page as "the original editor of the Encyclopaedia Metropolitana.")
Below we link to scans of the volumes at HathiTrust, as well as scans of some of the volumes at the Internet Archive that can be downloaded anywhere.
This edition is very similar to the 1829 edition, but there are some changes, including a new article at the start of Volume XII.
This is a "meta-book", which stitches together separate files elsewhere on the Web as they appeared in a previously published book. It is subject to removal if someone produces an integrated edition. If that happens, The Online Books Page will point to the integrated version.