—— Same. No. 809. The Mediterranean, physical and historical. By Sir R. L. Playfair. From the Smithsonian report for 1890. Washington, 1891. 20pp..10
—— Same. No. 810. Stanley and the map of Africa. By J. Scott Keltie. From the Smithsonian report for 1890. Washington, 1891. 17pp.
.05
—— Same. No. 811. Antarctic explorations. By G. S. Griffiths. From the Smithsonian report for 1890. Washington, 1891. 14pp..10
—— Same. No. 812. The history of geodetic operations in Russia. By B. Witskowski and J. H. Gore. From the Smithsonian report for 1890. Washington, 1891. 12pp. .05
—— Same. No. 813. Quartz fibers. By C. V. Boys. From the Smithsonian report for 1890. Washington, 1891. 22pp..10
—— Same. No. 814. D. Kœnig's researches on the physical basis of musical harmony, and timbre. By Sylvanus P. Thompson. From the Smithsonian report for 1890. Washington, 1891. 27pp..10
—— Same. No. 815. The chemical problems of to-day. By Victor Meyer. From the Smithsonian report for 1890. Washington, 1891. 17pp..10
—— Same.. No. 816. The photographic image. By Raphael Meldola, F.R.S. From the Smithsonian report for 1890. Washington, 1891. 14pp..10
—— Same. No. 817. A tropical botanic garden. By M. Treub. Translated. From the Smithsonian report for 1890. Washington, 1891. 20pp..10