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
Encyclopedia Africana never completed the project, the idea of an encyclopedia that explored the black experience was revived and expanded by W. E. B. Du Bois. In 1901 Du Bois widened the scope of the project to encompass the entire African diaspora. He suggested that the encyclopedia be called the "Encyclopedia Africana" in a similar fashion to the "Encyclopædia Britannica". Du Bois envisioned a scientific and comprehensive work on Africa and peoples of African descent that would refute the Enlightenment notion of blacks as devoid of civilization and the hallmarks of humanity. Due to lack of support from the established philanthropies, the