Show mapping the nation afore ban than gab theria of the ar at A x of the united sattes hie his been surveyed and mapped by topographer topographers of alic b 0 united state states geological eurey survey in connection 0 n W with ith th the pre preparation on of a detailed topographic atlas of the coun try the maps arkils lied quadrangles and shaft sho by a system of contour tines lines all topographic mature Pa tures giving elevation elevations 04 determined by the surveys spirit lerel level work the are area areas limited by par allees of latitude and meridians of longitude and differ in elic size with the latitude of the area areas and with ibe the scalea of the arps topographic work has bit ir com plated in connecticut new jersey ithane lelamd hn ibe ile of columbi Columb lv and will be tin dished in maryland Ja aring the next in only fire are states bai his less ice idaa than oae oue tenth of the ho area ben boon covered cc vered I 1 it Is hot yet possible to make an n ew e dimate of the number jf f tact that will form the completed comp atlas but it wilf probably exceed alsin |