OF THE DISTRICT. 29] 
Srection No. 3. 
FROM THE OUTLET OF LAKE ST. CROIX TO THE MOUTH OF BOIS BRULE RIVER. 
Feet. 
Outlet of Lake St. Croix (feet below), 
Table Land at the mouth of Lake St. Croix (feet sheen ‘ ; 108 
Stillwater, one mile north, on Table Land, do. ‘ ‘ 250 
Trap Dike, nine miles F Beaek St. Croix Falls, do. : ; 466 
Summit, three miles above Sunrise River, do. ; ; 334 
Nine miles above the mouth of Kettle River, do. 5 d 304 
Thirty miles above the mouth of Kettle River, do. ; ‘ 445 
Hill, one mile north of Pijiki Lake, do. , : 596 
St. Croix and Brulé Portage, do. ; : 656 
Head of Bois Brulé River, do. ; ; 544 
Fifteen miles below the Portage, do. ; : 415 
Third Portage on Bois Brulé River, do. ’ ‘ 373 
It will be seen by this table and reference to the sections, that the line of greatest 
altitude decreases from the eastern boundary of the territory, as the range of high- 
lands is followed westward. This will be still more manifest by referring to the 
geological section from the mouth of Montreal River to the water-shed. On this 
section, the elevations are given as far as measurements were made; and it will 
be perceived that the elevation of the water-shed, on that route, is more than four 
hundred feet greater than it is between the sources of the Chippewa and the 
west fork of Bad River, and six hundred and forty feet higher than the highlands 
between St. Louis River and the Falls of St. Anthony,—the top of the rapids 
above the Falls of St. Anthony being fifty-one feet higher than the level of Lake 
Superior. 
It will also be seen, by consulting the sections of elevation, that a range of high- 
lands extends along the line dividing the sandy and limestone regions, following the 
general course of the Mississippi, and crossing the tributaries of that stream from 
twenty to forty miles above their mouths. Along this line of elevation, the country 
is generally much lower than along the water-shed; although, at some points, as at 
the Dalles of the Chippewa, for example, the tops of the highest ridges equal in 
height the great range directly north of them. 
This elevation of the sandy region contributes very much towards modifying the 
climate of the agricultural district bordering on the Mississippi. The rays of the 
sun act more energetically in elevated than in low regions; and as the direct in- 
fluence of the sun is necessary to the germination and perfection of vegetation, and 
especially of wheat and other grains, the soil of the high limestone district is pecu- 
liarly favourable to the growth of such grains. The generally clear and dry state 
of the atmosphere in midsummer, secures them from blight and mildew. 
The distinctive features or peculiarities of the fourth and fifth divisions, as well 
as of so much of the third as borders Wisconsin’ River and its sources, will be no- 
ticed in the narrative of explorations in those sections of country, and in connexion 
with their Geology, in Chapter HI. 
