298 GEOLOGICAL KXCUKSION TO THE ROCKT MOUNTAINS. 



ceding account is extensively quarried al several points near Chicago. 

 It is the Guelph division of the Niagara which Is found here. In oom- 



position it is a typical dolomite of groat purity. It was originally a 

 highly fossil Herons limestone, and many species new to BOience have 



been described from the internal casts of the several divisions of the 

 Mollusca that occur here. 



South Chicago, a few miles beyond the Illinois State line and 11 

 from the Central {Station, is already within the city limits. The road 

 now bonds to the westward, a mile or more away front the lake, to Park- 

 side, and then runs north along the west side of .lackson Park, which 

 occupies a mile and a half of the immediate shore line, and is the site 

 of the Columbian Exposition. Beyond Jackson Pari it again reaches 

 the shore, which it follows for (! miles to the Baltimore and Ohio 

 station situated on the borders of Lake Park, which occupies a mile of 

 the lake front opposite the central business portion of Chicago. 



FROM CHICAGO TO THE MISSISSIPPI RIVER. 



ITINKKAKY. 



By S. V. Emmons, ' 



Station. 



Chicago 



Western Onion Junction 



Mih\ auki'ea 



Hrooktielil 



IVwauki't! 



( U'onomowoc 



Distance. 



£ 

 s 



O 



a 

 o 



100 

 137 

 176 



185 

 206 







aa 



85 

 100 



128 



Elevation. 



4* 



1 



X 



E 

 | 



589 



,80 



Station, 



1 lisl.lllir. 



% 



588 



178 



PortageCity 188 



Kill>oiirii City ' 205 



Niw Lisbon ! 221 



Toman M0 



Sparta I 257 



La Crossi! b 281} 



S 



B 



Kl' \ al [OH. 



- 



808 

 330 

 856 



386 



414 

 ■I."..-, 



8i:i 

 897 

 8M 

 afic 



708 

 057 



248 

 271! 

 272 

 294 

 24 i 

 200 



a Population, 204, 468. 



b Population, 26 



Chicago is the Second city in size and in commercial importance in 

 the United States, and probahly the greatest railroad center in the 

 world. Its population in 1890 numbered about 1,100,000 souls, an in- 

 crease of IIS per cent over that given by the census of ISS0. Its streets 

 are laid out on the rectangular system adopted by all modern American 

 cities. The first eleven cast and west streets from the Chicago River 

 southward have names (Lake, Randolph, Washington, Madison, Mon- 

 roe, Adams, Jackson, Van Buren, Harrison, Polk, and Taylor streets) J 



Geological <lata furnished by Prof. T. 0. Chamberlin and Prof. K. I). Salisbury. 



