Mathematical Geography
Johnson Willis E.
New York - Cincinnati - Chicago: American Book Company, 1907. - 346 p.Contents: The Form of the Earth; The Rotation of the Earth; Longitude and Time; Circumnavigation and Time; The Earth's Revolution; Time and the Calendar; Seasons; Tides; Map Projections; The United States Government Land Survey; Triangulation in Measurement and Survey; The Earth in Space; Historical Sketch.