EXCURSION BULLETIN NO. 2 



PRICE 10 CENTS 



THE 



GEOGRAPHIC SOCIETY 



OF CHICAGO 



EXCURSION ON THE ROCK RIVER OF ILLINOIS 

 BETWEEN ROCKFORD AND DIXON 



PREPARED OCTOBER. 1911 



BT 



MR. R. E. BLOUNT, Leader 



PORTION OF THE ROCK AND PECATONICA RIVERS, ROCKFORD, 

 NEW MILFORD, BYRON, OREGON, GRAND DETOUR, DIXON 



PRE-GLACIAI. STREAMS, CONJECTURAL 



