MEMORIAL COLLECTION Commerce. Its tendency to build up cities and exhaust the country II.—OHIO AND MISSISSIPPI RAILROAD. ry Surveys of the Western division chartered by the State of Illi- By E. GEST, Chief Engineer &c. III.-SOUTHERN ROUTE TO THE PACIFIC. Account of a route From the Report of Capt. R. B. MARCY, U. S. A. THE PRAIRIE DOG. Dog towns of the Mora Valley. Similar- ity of the dwelling places of the prairie dogs to the labyrinths of Egypt their habits &c. Extracted from a forth coming work entit- led "Travels in Search of the Elephant or the Wanderings of an |