N. W. Point of the Laké of the Woods. 53 
Rat ofthe Wo Station, and most northwest point of the Lake 
ge in the vicinity of Mr. Thompson’s Monu- 
isekteN 
Difference - meridional parts. Difference of longitude. 
3’ 977 ‘63 
It is therefore evident, that, acoonsling to the observations, 
Mr. Thompson’ s Monument No.1, is a little more northwest 
than the station near. the Rat Por nee but the most north- 
to 
the Principles explained in this report, the most "norihvaee 
ern point of-the Lake of the Wood 
/ith regard to the accuracy ‘of the observations, I beg to 
remark—1, That the angles by which the latitudes are de- 
termined are all read off on the same, or nearly the same, 
divisions of the sextant, and that, consequently, all errors, 
which the sextant may have, are common to both ne a 
and do not affect the difference of latitude on which the 
sult chietiy depends. 2. The difference of longitude bag 
correct, ‘require an error of more than one min ute 
in one vi the. latitudes, or an error of more than thirty seconds 
and of contrary sign in sage to change the result derived 
from the observations. 3. The agreement of the two. 
corcnociiaa shows, the differents of longitude 
be far from the truth. 4. If there should be any doubt: res- 
pecting the beanie for time dependin ng on single alti- 
tudes, on account of the possible errors of the instrument, it 
is to be observed that these errors would be too small to af. 
fect the result, and that nearly the same difference of longi- 
tude may be derived from the oes altitudes only which are 
not liable to the same objecti 
The sun’s eros and thé equation of time, have been 
calculated from the manack, on the supposition 
94° 39! west of the tue 0 ests, at Greenwich, whic 
_Note.—Mr. Tiarks made oath in New-York, Noy. 18th, 1825, before Judge 
oe to the trnth and correctness (to the best of his knowledge) of the — 
