PROCEEDINGS 



OF THE 



AMERICAN PHILOSOPHICAL SOCIETY. 



Vol. IV. APRIL— JUNE, 1844. No. 30. 



Stated Meeting, Jlpril, 5. 



Present twenty-two members. 



Dr. Patterson, Vice-President, in the Chair. 



Mr. Hubbard of New Haven, a visiter, was introduced by 

 Mr. Walker. 



Letters were announced and read: — ■ 



1. From Major Graham, dated N. York, March 28, 1844, in 

 relation to copies, presented by him to the Society, of a pro- 

 file or vertical section, with the spirit level, of the country 

 traversed by the due north line from the monument at the 

 source of the river St. Croix to the river St. John; derived 

 from surveys executed under his direction in the years 1840 

 and 1841, while serving as United States' Commissioner for 

 the survey of the territory on the N. E. frontier of the United 

 States, then in dispute with the government of Great Britain. 



In presenting this document, Major Graham called the attention 

 of the Society to the strong contrast which appeared on a comparison 

 between the aspect of the country traversed by this due north linCj 

 as there developed, and that exhibited by the profile of Col. Bou^ 

 chette, the British surveyor, under the fifth article of the treaty of 

 Ghent, derived from his surveys of that fine, and his barometric mea'* 

 surements upon it, in the years 1817 and 1818. 



The direction of the meridian line, whose profile or vertical line 

 was now offered to the notice of the Society, was obtained from nu- 



VOL. VL — H 



