372 Dr Richardson’s View of the Gcognostkal Structure 
system ; then I would supplicate Mr Brooke to extend to that 
system the same indulgence which he has shewn to chemistry 5 
and that he would, in his next edition, conclude his observations 
on it with the same words with which he has concluded his 
observations on chemical analysis : u These anomalies will, how- 
ever, probably be reconciled by the future investigations of 
science.” 
Edinburgh, } 
Aug, 9. 1823. > 
Art. XXX. — General Viezv of the Geognostical Structure of 
the Country extending from Hudson's Bay to the Shores of 
the Polar Sea . By John Richardson, M. D., Member of 
the Wernerian Natural History Society, &e. 
We have great pleasure in laying before our readers this 
luminous sketch of Dr Richardson’s, extracted from one of the 
most deeply interesting and affecting narratives ever laid before 
the public, the Journey to the Shores of the Polar Sea, by Cap- 
tain William Franklin. 
“ The observations of Werner, Humboldt, Von Buch, Sans- 
sure, Ebel, and Daubuisson, in many districts on the Conti- 
nent of Europe, and in America, and by Jameson in Scotland,, 
shew that the general direction of the primitive and transition 
strata is nearly from NE. to SW. It is therefore interesting to 
find, that the general result of my notes on the positions of 
these rocks, which we traced (except in a few instances, when 
our route lay to the westward of their boundary,) through 12 
degrees of latitude, also gives NE. and SW. as the average di- 
rection of their strata. 
The strata of the two classes of rocks just mentioned, were 
always more or less inclined to the horizon, the mean angle con- 
siderably exceeding 45°. Their dip was sometimes to the east, 
sometimes to the west. 
These rocks exhibited the same varieties of structure that 
they do in other extensive tracts of country. In general, the 
slaty structure was parallel to the direction of the strata, as in 
gneiss, mica-slate, clay-slate, &c. When the waved structure • 
