Ril INTRODUCTION. 
notice whether any, and what kind or degree 
of, influence the Aurora Borealis might ap- 
pear to exert on the magnetic needle; and 
to notice whether that phenomenon was 
attended with any noise; and to make any 
other observations that might be likely 
to tend to the further developement of 
its cause, and the laws by which it is 
governed. ap 
Mr. Back and Mr. Hood were to assist 
me in all the observations above-mentioned, 
and to make drawings of the land, of the 
natives, and of the various objects of natural 
history ; and, particularly, of such as Dr. 
Richardson, who, to his professional duties, 
was to add that of naturalist, might con- 
sider to be most curious and interesting. 
I was instructed, on my arrival at, or 
near, the Mouth of the Copper-Mine River, 
to make every inquiry as to the situation 
of the spot from whence native copper had 
been brought down by the Indians to the 
Hudson's Bay establishment, and to visit 
and explore the place in question; in order 
that Dr. Richardson might be enabled to 
oot 
