RIVER SYSTEMS OF NEW HAMPSHIRE. 



309 



Tributaries of Merrimack River — Continued. 



The Contoocook river of this system is the largest tributary river in 

 New Hampshire. Its area of drainage on the south-east is narrow. 

 From the north-west side it receives Blackwater and Warner rivers in 

 Hopkinton, North Branch, near the north Hne of Antrim, and Nubanusit 

 river at Peterborough. 



Androscoggin River System. 



The Androscoggin river is entitled to this name southward from the 

 confluence of the waters of the Magalloway and those of the range of 

 lakes at a point about one mile from Umbagog lake, and three miles, 

 nonth-east from Errol dam. The area drained by this river in New 



