Produced by Marius Masi, Don Kretz and the Online Distributed Proofreading Team at https://www.pgdp.net Transcriber's notes: (1) Numbers following letters (without space) like C2 were originally printed in subscript. Letter subscripts are preceded by an underscore, like C_n. (2) Characters following a carat (^) were printed in superscript. (3) Side-notes were relocated to function as titles of their respective paragraphs. (4) Macrons and breves above letters and dots below letters were not inserted. (5) [root] stands for the root symbol; [alpha], [beta], etc. for greek letters. (6) The following typographical errors have been corrected: ARTICLE ECHTERNACH: "The origin of this festival is uncertain, but it dates at least from the 13th century and was probably instituted during an outbreak of cholera." 'an' amended from 'on'. ARTICLE ECONOMIC ENTOMOLOGY: "Among the Coleoptera or beetles there is a group of world-wide pests, the Elateridae or click beetles, the adults of the various 'wireworms.'" 'beetles' amended from 'bettles'. ARTICLE EDUCATION: "... laid down that the application of a candidate might in no circumstances be rejected on any religious ground, nor on the ground of social antecedents or the like." 'be' amended from 'he'. ARTICLE EDUCATION: "The public assistance afforded to secondary education in Wales under the Intermediate Act is supplemented by the grants of the Board of Education, and the Board's revised Secondary School Regulations were applied to Wales in 1908." 'education' amended from 'educaton'. ENCYCLOPAEDIA BRITANNICA A DICTIONARY OF ARTS, SCIENCES, LITERATURE AND GENERAL INFORMATION ELEVENTH EDITION VOLUME VIII, SLICE X Echinoderma to Edward ARTICLES IN THIS SLICE: