Vol. I. Mankind.-- Vol. II. Natural history.-- Vol. III. The universe.-- Vol. IV. Communications.-- Vol. V. Great lives.-- Vol. VI. Farming and fisheries.--Vol. VII. Industry and commerce.-- Vol. VIII. Engineering.-- Vol. IX. Recreations.-- Vol. X. Law and order.-- Vol. XI. The home.-- Vol. XII. The Arts.--A general index