Encyclopedia ofChicago

Historical Sources : Bound Volume
Historical Source
R
Rand McNally & Co.'s New Street Number Guide Map of Chicago, 1910

 

 

 

Rand McNally & Co.'s New Street Number Guide Map of Chicago, 1910

Besides postcard makers, mapmakers also saw a dramatic rise in business as a result of the new system. This 1910 Rand McNally map shows that every eight blocks on the grid (starting from State Street and moving west) marks a major thoroughfare.