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Articles and illustrations from the Encyclopaedia Britannica, 9th Edition (1875) and 10th Edition (1902). Searchable by keyword and browsable by subject index.
Encyclopaedia Britannica Online
Provides selected articles for free, full text with search capabilities, multimedia and related links for subscribers.
Alphabetical arrangement of information from the late 1800s.
Links to on-line Smithsonian resources and answers to frequently asked questions from A to Z.
Offers articles from the Columbia Encyclopedia and Britannica Concise Encyclopedia.
How Stuff Works
Articles explain how hundreds of things work, from elements of the human body to space-age technology.
Online dictionary, Columbia Encyclopedia, and almanac reference.
Nuttall Encyclopædia of General Knowledge
Approximately 14,000 entries on topics including art, geography, literature, philosophy, religion. Originally published in 1907.
Offers articles from on the 11th edition Encyclopedia Britannica, and from the Crystal Reference Encyclopedia. All articles are searchable and alphabetized.
Simple English Wikipedia
User-contributed online encyclopedia intended for people whose first language is not English.
World Book Encyclopedia
Online version of the complete reference work along with dictionary, atlas, links, magazines, historical documents, audio, video, images, and 3D photographs. Requires free temporary registration with option to buy continued access for full articles.
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