482 CVA NG OLD ON: 
preceded it is evident that the westward extension of the Milford 
channel must be sought farther south. From the behavior of 
the rivers and the general character of the drainage it is sus- 
pected that the course of this channel lies westward along 
Portage Creek, a few miles north of Jackson, then southwestward 
by way of Homer, and thence down the St. Joseph River, join- 
ing the Kalamazoo at South Bend. 
Reversal of Drainage.—The limited amount of study thus far 
given to the region has shown the existence of many interesting 
examples of stream piracy and reversed drainage. The writer has 
pointed out one of these in the case of Black River near Port 
Huron.’ Several others can be readily pointed out on the accom- 
panying map. It is evident that the region of southern Michi- 
gan offers excellent opportunity for physiographic study, and the 
legislature of the state could not perform a better service than 
to make a liberal appropriation to the geological survey for the 
purpose of putting this material in shape for the use of the 
public schools. 
C. H. Gorpon. 
tJouR. GEOL., Vol. V, 1897, p. 315. 
