Review of Owen’s Geological Report on Wisconsin, Iowa, etc. 87 
now proceed to do in as succinct a manner as the interest of the 
subject permits, premising with a few remarks on the general 
appearance of the work. 
The text is comprised in a handsome quarto of 638 pages, in- 
terspersed with upwards of 140 wood-cuts, 70 of which are geo- 
logical scenes of particular interest ; the rest local sections. hey 
An Atlas of plates accompanies the text and contains 27 steel- 
plate engravings of the most characteristic fossils of each of the 
formations found in the District, from the oldest fossiliferous strata, 
to the Kocene tertiary, 18 large plates of sections and profiles of 
heights, nine of which are on steel and nine on stone. Five of 
the largest sheets of sections have the topography of the princi- 
pal streams plotted, in connection with the sections, which add 
ocene Tertiary Basin of Nebraska; and the other, which is 
colored to represent the extension of the geological formations 
under the vast drift deposits of the interior. The geology of the 
entire region, together with the approximate boundary of the ex- 
tension of the Iowa coal field through Missouri, is united on a 
large colored map, 28 inches ° 
The engravings on steel, representing the organic remains, de- 
