LIST OF ILLUSTRATIONS. xi 
ENGRAVINGS ON COPPER. 
A large Geological Map of the whole District, elaborately coloured, embracing Wisconsin, Towa, and Min- 
nesota, together with a portion of Missouri and Illinois. 
A quarto Map of parts of Wisconsin and Minnesota, showing the extension of the rock formations con- 
cealed under the drift. 
ENGRAVINGS ON STEEL. 
Twenty-seven quarto Plates of Organic Remains, eight of which are executed by the medal-raling process, 
from original specimens, two in part by the same process, and five from daguerreotypes of the fossil 
mammalia and reptilia of Nebraska. 
A quarto Map of the Mauvaises Terres of Nebraska. 
Coast Section, one hundred and forty miles in length, of the Northwest Shore of Lake Superior; coloured. 
Pl. N, Coast View, Section, and Map of Grand Portage Bay and Pigeon Point; coloured. 
Pl. 1 N, Outline of Hills and Sections in the vicinity of the Northwest Coast of Lake Superior, from 1 
to 9; coloured. 
Pea R, Heattoan’’ in Minnesota, from 1 to 5; coloured. 
Pl. 3 N, Sections on Streams flowing into Lake Superior from the North, in Minnesota, from 1 to 6; 
including Section No. 4, 8, on the St. Peter’s River, and Section No. 7, on the Mississippi, above 
the Falls of St. Anthony; coloured. 
Sections on the Wisconsin River, from 1 to 35, inclusive; also on the Mississippi, north of the Wisconsin 
River, from 1 to 8, and from A. to T., inclusive; coloured. 
Sections on the Missouri River, from 1 to 19, in connexion with a draught of the River; coloured. 
Sections in continuation of the above, from 20 to 40, up to Council Bluffs; coloured. 
ENGRAVINGS ON STONE. 
Sections on the Des Moines River, in connexion with a draught of the same, between the Mouth and the 
Raccoon Forks, from 1 to 40; coloured. 
_ Sections in continuation, above the Raccoon Fork, from No. 41 to No. 65; coloured. 
No. 2. General Section on the Mississippi, between the Mouth of the Wisconsin and the St. Peter’s 
Rivers; coloured. 
No. 3. Section A to F, on the St. Croix. 
No. 4. Section from the Mouth to the Dalles of the St. Croix; coloured. 
No. 5. Section on the Mississippi, from the Mouth of the St. Croix to the Falls of St. Anthony, and 
Section 1, 8, at the Detroit of the St. Croix; coloured. 
Sections on the Streams flowing into Lake Sulpusiet from the south, No. 1 to 4, W; coloured. 
Section through the interior of Wisconsin, from 1 to 3, R, and Section No. 2, S, at the Falls of St. An- 
thony; coloured. 
Section No. 6 of the Great Slide on the Mississippi, between Lake Pepin and Mountain Island. 
