I76 PHYSICAL GEOGRAPHY. 



Ossipee river on the border of Freedom. Southward, except its lakes, the 

 country has no striking characteristics. The line touches Province pond, 

 that lies principally in Effingham and Wakefield, and in the south part of 

 the latter it strikes East pond, which is the source of Salmon Falls river, 

 and this is the boundary to the ocean. From the mouth of the river the 

 line runs along the main channel, and divides the Isles of Shoals into 

 unequal parts. The largest area, including Appledore and Smutty-nose 

 islands, belongs to Maine ; but Star island, which has the chief popula- 

 tion of the islands, belongs to New Hampshire. The boundary line 

 passes between Smutty-nose and Cedar, which are practically one, and 

 Star island. J. H. Huntington. 



Western and Southern Boundaries. 



There has been no end of dispute respecting the southern boundary 

 line. The south-eastern portion is made to average the distance of three 

 miles northerly from the Merrimack river for about thirty miles. From 

 a fixed point, a "pine tree" between Pelham, N. H., and Dracut, Mass., 

 five and one fourth miles east of the Merrimack, there commences a line 

 running directly to Connecticut river, with the course N. 86 59/ 37" .5 W. 

 The distance is about fifty-eight miles. According to a plan in the state 

 library, the distance between the south-east corner of Hinsdale and a 

 due east and west line starting from the pine tree and ending on the 

 west bank of Connecticut river, is 942 rods. The difference between 

 the true and magnetic meridian is given as 6 20' 30". The plan was 

 drawn by E. Hunt, from a survey made August, 1825. 



The western boundary of the state has been fixed at low water on the 

 west bank of Connecticut river as far as the north-east corner of Ver- 

 mont. Above that point the small Hall's stream separates the state from 

 the province of Quebec. 



Elevations along the Boundaries of New Hampshire. 



Height of tide at Portsmouth is 8.6 feet; the mean or half tide is, in all cases, the 

 datum to which our altitudes refer. Head of tide in branches of the Piscataqua is 

 at Exeter, Dover, and South Berwick. 



Height 

 in feet. 



Great Falls, top of dam, 166 



Three Ponds, Milton, 409 



