Encyclopædia Britannica it is scarcely used, and reviewers have recommended that it be dropped from the encyclopaedia. The also has color transparencies of human anatomy and several appendices listing the staff members, advisors, and contributors to all three parts of the Britannica. Taken together, the and comprise roughly 40 million words and 24,000 images. The two-volume index has 2,350 pages, listing the 228,274 topics covered in the "Britannica", together with 474,675 subentries under those topics. The "Britannica" generally prefers British spelling over American; for example, it uses "colour" (not "color"), "centre" (not "center"), and "encyclopaedia" (not "encyclopedia"). However, there are exceptions to
Otto's encyclopedia the original work, thus preserving the exact look and feel of Otto's encyclopedias. "Otto's encyclopedia" demonstrated the progress of Czech society and greatly supported its rising national identity. Even today, it is a good source of information, mainly on historical subjects. Derek Sayer in his book says that "But it is Ottův slovník naučný that remains the greatest of Czech works of reference, unsurpassed by anything published since. In its time it was one of the largest encyclopedias in the world, second in the number of its entries and illustrations perhaps only to the "Encyclopædia Britannica"." Otto's encyclopedia Otto's encyclopedia