ALTITUDES. 273 



HiUsborough Branch Contoocook Valley Railroad. 



DiS a,n C c e o S l m Heights in feet.' 



Contoocook, . 12 miles. 373.38 



West Hopkinton, 15 " 391.79 



Crossing of old N. H. Central Railroad, Henniker, . . 426.29 



Henniker, 20 " 439.32 



Paper-mill pond, water, ....... 432. 02 



Foot of Long fall, Contoocook river 433.82 



Head of Long fall, 10,000 feet distant, .... 546.91 



HiUsborough Bridge station, 27 " 574.O3 



HeigJtts in Boscawen and Salisbury. Furnished from surveys for 

 Blackwater River Railroad, by R. S. Howe, engineer. 



Heights in feet. 



Dingett's Corners, 479. 9O 



Blackwater river at crossing, \ mile above this place, .... 442.96 



Clark's island, 5O8.80 



Blackwater river, \ mile above Clark's island, . . . . . . 526.67 



Webster village, 555..0O 



Salisbury, south line of township, 568.72 



South Salisbury, road, 563.2 



Salisbury Centre, road, 592. 5O 



North Salisbury, island in river, 6O2.2O 



The " Bay" at this place, 598. 9O 



Fourth N. H. Turnpike, near J. G. White's, Andover, .... 632. OO 



South-west corner of the town of Salisbury, . . . ... . 899.23 



Heights on Kearsarge Mountain. Furnished from carriage-road sur- 

 vey, Warner, by R. S. Howe. 



Heights in 

 feet. 



U. S. Signal post, Kearsarge mountain, 2942.79 



Kearsarge mt., " Garden," 2622. 5O 



Plumbago point, southerly end of Mission ridge, .... 17O5.OO 



Lowest point between Kearsarge and Black mountain, . . . 2426.67 



Lowest point between Mission ridge and Black mountain, . . . 2252.55 



7. RAILROAD SURVEYS IN NORTHERN NEW HAMPSHIRE. 



Heights along Boston, Concord & Montreal Railroad, and Mt. Wash- 

 ington Branch. 



The records of this road having been lost by fire, the altitudes published in Guyot's 

 Memoir on the "Appalachian Mountain System, "which were derived from the original 



VOL. i. 37 



