The introduction by its Editor-in-Chief, Hugh Chisholm, to the encyclopædia as a whole, setting out its scope, organization, and principles.
A history of the Encyclopædia Britannica from its founding in 1768 through the eleventh edition, written by the editors. Traces the evolution of the work across eleven editions and explains the aims of the current one.
The editors' preface to volume 29, explaining the principles behind the index: what was included and excluded, how references are structured, the treatment of biographical and geographical entries, and the relationship between the index and the Classified Table of Contents.
The key to reading the index: typographic conventions, alphabetization rules, geographical heading formats, and a complete list of the 362 abbreviations used throughout the index and the encyclopædia itself.
The edition's famous seventeen full-color fold-out maps, engraved by Justus Perthes of Gotha—as printed in 1911 and, where available, with the Stieler Hand-Atlas originals they were engraved from, at full resolution.
A 65-chapter companion volume to the 11th edition, organized as courses of reading for different occupations, fields of study, and interests. Each chapter's article citations are linked to the main encyclopædia, and author mentions are linked to the contributors page.