202 
EL PASO 
upoD, the acting Chief Astronomer, Lieutenant A. W. 
Whipple, on the part of the United States, and Don 
Jose Salazar, the Chief Astronomer on the part of 
Mexico, were directed to “ measure, according to 
Disturn ell’s Map, edition of 1847, the distance between 
latitude 32° and the point where the Rio Grande strikes 
the Southern Boundary of New Mexico ; and also the 
length of the Southern Boundary line of New Mexico 
from that point to its extreme western termination,” 
and to report the result of their examinations to the 
Commissioners at the earliest period practicable. 
At the meeting of the Commission held on the 25 th 
day of December, the following report was presented : 
“ In accordance with resolutions passed on the 20th 
instant, at an official meeting of the United States and 
Mexican Boundary Commissioners, we, the under- 
signed, have this day met for the purpose therein 
indicated. 
“ With a certified copy of the Treaty Map before 
us, we proceeded to make a scale of minutes of latitude, 
by dividing into 120 equal parts, the length of that 
portion of a meridian laid down upon the map between 
the parallels of 32° and 34° of north latitude. 
“In a similar manner we found a scale of minutes 
of longitude for that degree of latitude, which passes 
through points of the Southern Boundary of New 
Mexico, as indicated upon the same map. 
“ Then measuring the distance from the point 
where the middle of the Rio Grande strikes the 
Southern Boundary of New Mexico, south to the 
parallel of latitude marked 32°, and applying it to our 
scale of minutes of latitude, we found the length equal 
