(m) 



GOOSE LAKE. 



An eighth of a mile south of the outlet of Harkness Slough 

 into Bear Creek, is a wide opening on the east into Goose Lake, — 

 an open sheet of water, from the _ shores of which much of the 

 forest has been removed. It becomes shallower and its bottom 

 more sandy towards its south end, from which a channel extends 

 which formerly put it into communication with the bay, three 

 quarters of a mile below. 



LIBBY LAKE. 



This name was given me by one of the fishermen for a long, narrow 

 pool on the west side of Bear Creek about midway between the 

 outlet of Goose Lake and the Bear Creek sluice-gate. It is not 

 named on any map at hand. It was in some respects very difPer- 

 ent from any other water in which collections were made. The 

 water was quite deep, and, for the situation, unusually clear and 

 cool, and gave promise of a growth of aquatic and sub-aquatic 

 vegetation at the edges later in the season. It is scantily edged 

 with willow and button bush and a few other trees and shrubs. 



QUINCY BAY. 



The four bodies of water just described are within the levee. 

 Quincy Bay extends from the levee where this reaches the Illinois 

 bluff (about three miles and a half north of Quincy) directly south- 

 ward along the foot of the bluff to the tow-head opposite the centre 

 of the city, at which point it opens to the river. It varies 

 little in width and will average perhaps a third of a mile. It is little 

 more than an inlet of the Mississippi containing back-water dur- 

 ing the latter part of the year, the water in much of it becoming 

 then very shallow and the current almost disappearing. During the 

 month spent at Quincy this year, the water did not reach its usual 

 low stage, and the current due to waters received from Bear Creek, 

 and the sloughs, creeks, and springs, was sufficient to keep the bay 

 quite clear of the ahgse which would otherwise have appeared upon 

 it. Its bottom is commonly muddy and no promise of other 

 aquatic vegetation could be seen in it. It is edged with woods 

 quite continuously on the west, and on the east also there 

 is some growth of forest where the strip of level soil between 

 the bay and the bluff gives room for it. 



WILLOW SLOUGH. 



This narrow channel extends obliquely across from the river to 

 the bay outside of and parallel with the levee. It enters the bay 

 about one and two thirds miles above the south end of the tow- 

 head, and leaves the river a little over four miles north of the 

 same point. Its length is about two and two thirds miles. At 

 high water a current from the river sweeps through and reaches 



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