Coast and Geodetic Survey sesquicentennial papers, sesquicentennial of public service, [by] H. Arnold Karo; 9th Congress of United States (act of Feb. 10, 1807); Coast and Geodetic Survey in Philippine Islands, [by] Earle A. Deily; Century and half of scientific nautical charting, [by] A. L. Shalowitz; Hydrographic work of Coast and Geodetic Survey, [by] Karl B. Jeffers.