Scale: 1:31680 Image is from a copy of the original on Mylar. For drawings #2 to 34 inclusive. Numbers 2 to 34 (encircled) indicate the sheet numbers of drawings covering survey. All contour elevations indicated on drawings = City Datum. City Datum = El. 100.00 B.M. at Old P.O. Bldg. Trenton, NJ. U.S. Coast Geodetic Survey El. at same B.M. = 54.963. Contour intervals, 2 feet on Dr'wgs - #2 to 22 incl. 25, 26, 27, 31, 33, + 39. Contour intervals, 2 feet and 10 feet on others, as noted there on. Elevation of contour lines indicated by figures on line. Figures shown inside of closed contours show the actual elevation on the earths surface indicated by a small cross. Figures shown at street or highway intersections, also along center of streets or highways, indicate elevation at the point. Industrial and wooded areas, railroads, cemetaries, school and hospital grounds not surveyed.