24 g Gen . Roy’s Account of 
From this mode of conducing the operation, it will 
readily be feen, that, if time had permitted, the iituation of a 
multitude of other points in the country might have been very 
accurately determined, hefides thole actually marking the 
points of the triangles, whereby the ordinary maps would have 
been greatly improved bv fuch as chofe at any time hereatter to 
make ufe of thefe as fo many given diftances. hut the circum- 
ftances not having permitted us to multiply thole points to the 
extent that might have been wifhed, and that would have been 
e a lily pradicable, if the operation had commenced at an earlier 
feafon of the year ; we have therefore been obliged to limit the 
number to a few of the mod confpicuous and bed defined objeds. 
Thefe fecondary triangles are fubdivided into two lets. The 
firft fet conlifts of thirty-five, whereby the relative diftances offo 
many points have been determined from certain ftations of the 
principal feries, beginning with thofe objeds that have been in- 
terfeded from the moft wefterly ftations, and lo on, proceeding 
gradually with the others towards the eaft. Two angles only 
of each of thofe triangles being obferved, the third is that at 
the interfeded objed, or the fupplement to i8o°. Although 
the diftances thus obtained cannot be quite lo accurate as the 
fide s of the principal feries ; yet there is no reafon to appre- 
hend, that they will be found to differ widely from the truth, 
when the}/ come to be proved in the courfe of any fubfequent 
* operation, by which alone the}/ can be put to the teft. 
f . i i 
Com- 
