Prime meridians Washington D.C. and Greenwich. Relief shown by hachures. Russian and Ottoman Empires are delineated. Includes etymological explanation of various geographical terms from several languages. // First edition was 1875. The maps here are identical to our 1878 Gray's Atlas of the United States, except that this copy has 17 large scale maps of Virginia Cities in the rear with a Professional Directory of Patrons. Virginia. The 1878 U.S. Atlas has a large map of New England in the rear and a directory of patrons for Rhode Island and Massachusetts. It is a mystery why Gray used two different titles for essentially the same atlas. The source of the Virginia city maps is interesting - about half state under the title that they are from Special Surveys by Jacob and George Chace, Topographical Engineers. The other half do not list the Chaces. There is no record of these maps in Phillips, either as an atlas or separates. Perhaps they were sold as separates or pocket maps. Several sheets intentionally left missing; not listed in Table of Contents. Maps are in full color typically differentiating counties or states.