On the American line from the Metjarmette portage
to Lake Etchemm—­                                                Feet
The maximum height is                                         1,718
The minimum height is                                         1,218

The minimum measured height is that of Lake Etchemm, which is lower than the actual source of that stream, and whose omission as not upon the dividing ridge would make the minimum greater.  This height was determined by the parties of A. Talcott, esq, by two distinct and separate sets of observations, one of which was continued hourly for several days, and no doubt can exist that it is as accurate a measure as the barometer is capable of affording.  In the report of Messrs. Featherstonhaugh and Mudge this height is set down as no more than 957 feet, but it is determined from a single observation.  That it is erroneous must be considered as demonstrated.  In the map presented by those gentlemen they have made use of this erroneous determination for a purpose which, even were it correct, would not be warranted, for they on its authority leave out all the symbols by which heights are represented, and substitute therefore a dotted line with the inscription “Fictitious hills of Mr. Burnham’s map.”  The actual character of this part of the American line is an undulating country.

On the line of Messrs. Featherstonhaugh and Mudge between
the Metjarmette portage and the Cocumgamoc Mountains—­           Feet
The maximum elevation is                                      2,302
The minimum elevation is                                        987

This part of the line of Messrs. Featherstonhaugh and Mudge derives its apparent advantage from the fact that it crosses the summit and occupies the eastern slope of the highlands claimed by the United States.  Notwithstanding this, the difference in their elevation is not such as to give it any decided superiority in its highland character.

On the American line from Lake Etchemm to the river Ouelle—­     Feet
The maximum height is                                         2,854
The minimum height is                                         1,306

On the line of Messrs Featherstonhaugh and Mudge from the
Cocumgamoc Mountains to the head waters of the Aroostook—­
The maximum height is                                         1,268
The minimum height is                                           880

On the parts of the line thus contrasted the maximum height of that claimed by Great Britain is less elevated than the lowest gap of that claimed by the United States.

  On the third portion of the American line