This treatise on the demography of sub-Saharan Africa contains materials on age and sex composition, fertility, and mortality. Sets of demographic data are emerging that provide the completeness and specificity required for critical evaluation and analysis. The main body of the work consists of case studies on the Republic of the Congo, French-speaking territories, Portuguese territories, the Sudan, and Nigeria. Evidence is described in critical detail, methods of analysis are presented in full; and the reader is given the basis for judging the quality of the estimates. Originally published in 1968. The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.