314 



PHYSICAL GEOGRAPHY. 



TRIBUTARIES OF PISCATAQUA RIVER. 



The altitudes of numerous other ponds not here mentioned, heights of 

 rivers on lines of railroad surveys and where crossed by geological sec- 

 tions, and the elevation of prominent points on water-sheds, given in the 

 preceding chapter, need not be repeated here. For the purpose of com- 

 parison we annex a few heights of lakes in other states. 



Height above sea. 



Moosehead lake, Maine, 1023 feet. 



Sebago lake, " 251 " 



Willoughby lake, Vermont, 1161 " 



Memphremagog lake, " 634 " 



Lake Champlain, " 93 " 



Lake Superior, 630 " 



Itasca lake, Minnesota, 1575 " 



EFFECT OF GEOGRAPHIC AND CONTINENTAL POSITION. 



If we inquire into the causes which influence the hydrographic char- 

 acter of New Hampshire, we find that the situation of our state gives 

 us favorable conditions of climate, producing well-watered fields for the 

 farmer, and abundant water-power for manufacturing industry. 



New Hampshire is situated between 42 40' and 45 18' 23" north 

 latitude, and between 70 37' and 72 37' longitude west from Green- 



