ALTITUDES. 



263 



hTja^ Heights in feet. 



Hall's brook, 41O.027 



Haverhill depot, 32 miles. 412.142 



Crossing to Nevvbury bridge over Connecticut river, . 413.857 



Newbury depot 35 " 426.OO2 



Wells River depot, 40.2 " 442.898 



Crossing 3 miles north, 437.642 



Ryegate depot, platform, 44 " 471.71O 



Crossing i mile south of Mclndoe's, .... 494.895 



Mclndoe's depot, 48.2 " 487.913 



Barnet depot, last point measured on the railroad, . . 50.7 " 467.1 14 



Hay scales, Upper Waterford 61 752.368 



Bridge, Upper Waterford, 15 feet above water, . . 689. 046 



Piazza, Sumner house, Dalton, . ' . . . 73 " 898.153 



Top of stone hitching post, south end of Dalton post-office, 912.6O8 



Door of County house, Lancaster, 80 " 867.444 



Hay scales, Northumberland, 85 " 865.352 



Bridge over Upper Ammonoosuc river, Groveton, . . 882. 67O 



Groveton depot (Grand Trunk Railway), . . . 89 " 90O.91O 



Railroad bridge 2 miles above Groveton, . . . 905.633 



Stratford Hollow depot, 93.5 " 877.388 



Stratford, flag station, 88O.242 



North Stratford station, 101 " 915.184 



Columbia bridge, 109 " 1O1 1.268 



Colebrook bridge, 113 " 1O25.674 



Middle of window on school-house 5 m. north of Colebrook, 1O78.784 



East end of Canaan bridge over Connecticut river, . . 120 " 1053.699 



Bridge over HalPs stream, 121.5 " 1097.963 



Foundation of red school-house at the "Hollow," 6 miles 



from Connecticut lake, 1494.97O 



Connecticut lake, 134 " 1618. 6O6 



4. EASTERN LINE OF REFERENCE. 



Heights along Boston & Maine Railroad. Copied from original pro- 

 file, through kindness of N. G. White, president, and reduced to mean 

 tide. 



^Boston. Heights in feet. 



Station at Boston, 

 Melrose, Mass., 

 Wilmington Junction, Mass., 

 South Lawrence, Mass., . 



7. miles. 

 18.1 " 

 26. 



13.5 

 62. 

 88. 

 49. 



