ALTITUDES. 275 



Distances Heights in 



from Concord. feet. 



.Ammonoosuc station, base of Mt. Washington, . . . 140 miles. 2668 

 Summit of Mt. Washington, 143 *' 6293 



Heights along the Grand Trunk Railway, 



Copied from tracing of profile furnished by C, J. Brydges, Manager, and reduced to 

 mean tide by connection with the special survey along Connecticut river, as previously 

 noticed (p. 251). This profile thus referred to sea level indicates for Gorham a 

 height 10 feet greater than that given for this railroad station by Guyot, from which 

 base his determinations of altitudes among the White Mountains were probably- 

 computed. (See note beyond.) 



Distances from Heights 



Portland. in feet. 



Line between Maine and New Hampshire, .... 82 miles. 713 



Shelburne, 85 " 723 



Gorham, 91 " 812 



Berlin Falls, 97 " 1035 



Milan summit, 102 " 1087 



Milan water-station, ...... 103 " 1080 



West Milan, 109 " 1015 



Stark water-station, 114 " 990 



Stark, 116 " 972 



Bridge over Upper Ammonoosuc river, 117 " 961 



Groveton, 122 " 901 



Stratford Hollow, 126 " 877 



North Stratford, 134 " 915 



Nulhegan, Vt., 139 " 1125 



Wenlock, Vt., . 141 " 1162 



Island Pond, Vt., 149 " 1197 



Summit, highest between Portland and Montreal, . . . 156 " 1385 



Norton, Vt., 160 " 1357 



Boundary Line station, P. Q., 132 miles from Montreal, . . 165 " 1232 



8. Heights of Villages. 



Abbreviations. L., Spirit Level; P. L., Pocket Level; T., Trigonometrical; B., 

 Mercurial Barometer; A., Aneroid Barometer. After names of mountains, G. signifies 

 measurements made by Prof. Arnold Guyot, ll. d., of Princeton, N. J.; J. those 

 taken by Dr. Charles T. Jackson, as published in his final report on the geology of 

 New Hampshire. Many of them have been calculated for the present chapter from the 

 observations printed in that volume. The trigonometrical measurements were made by 

 the United States Coast Survey, mostly under the direction of Prof. E. T. Ouimby. 



