N.W. Point of the Lake of the Woods. 43 
by a common. measure the difference of longitude and lati- 
on Mercator’s projection,) and if the former number is 
camel than the latter, the } rt ons , point is themore 
northwestern o 
The map of ‘the Lake of the Woods, which Mr. ‘Thomp- 
son has constructed from his eh tno that there are 
two points on this lake which are more northwest than all 
other ame of the lake, and so nearly ‘equally ile as 
to require a more accurate comparison, in order to pro- 
nounce with certainty which of them is, OAS rd the 
principles above explained, the most northwesterh point of 
the Lake of the Woods. These two points are: 5 the most 
northwest point of a deep bay, on which Mr. Thompson has 
placed his monument No. 1, (in latitude 46° 23’ nearly. 
of my astronomical Pre ae. is a “trom that the conclu- 
sions which have been drawn from the map with regard to 
the situation of the intermediate points, are perfectly just, 
ore comparing 
the situation of those points, I have endeavoured accurately 
to ascertain their difference of longitude, and their latitude, 
for which purposes the following observations were m ade. 
I have used an excellent sextant, of nine inches radius, made 
by Mr. Troughton, and two pocket chronometers, one made 
by Arnold, (No. 2111,) and the other by er (No. 201.) 
most northwest point in the neighbourhood of Mr. 
Thompson’s monument, No. 1, having no camping ground 
near it, I thought best to make my o Mbervations at the mon- 
ument itself, and to connect this point with the other by ac- 
tual measurement. 
