INDEX. 



PAGES. 



Abreviations 34 



Area 2 



A Strange Feature 39 



Black Ash Swamp 38 



Calceferous Beds 7 



Cement Beds 7 



Carboniferous Strata 3 



Classification of Plants 29-30 



Climate 10 



Coal Measures ... 3-10 



Comparison of Florae 21-22 



Coveli Creek 6,37 



Definitions 24-29 



Distribution of Plants 19-21 



Draining 17 



Drift 4-6 



Evolution 31 



Explanations 23 25 



Florae 40 



Forest, effect of 17-18 



Geuua 30-31 



Glacial Action 5 



Geography 2-3 



Geology 3 



Hailstorms 16 



How Plants Travel 35 36 



M ean Annual Temperature 12-13 



Interesting Localities. . . : 37 



Lake Superior 5 



Brackish Water Flora 39 



Niagara Rocks 5-6 



Origin of Drift 5 



Position of County 1 



Quantity of Seed 34 



Species 30-31 



St. Peter's Sandstone ... 6-10 



Rainfall 15-16 



Reddick Farm 37 



References 40 



Surface 2-3 



Table oi Strata. 9 



Table of Temperature 14-15 



Table of Rainfall 16 



Thunder Storms 16-17 



Valleys 11 



Varieties 31 



Variation 33 



Weeds Following Preface 



ADDENDA. 



The Salt Marsh is a swale, now drained, situated about 5^ miles 

 southwest of Ottawa at the foot of the Illinois bluffs. A salt spring 

 exists here and an artesian well bored some thirty years ago, about 

 forty rods southwest of Mr. Delbridge's residence, furnishes a consid- 

 erable volume of salt water. The water is not salt enough to be of 

 value as a source of salt. The vegetation of the vicinity presents 

 some brackish water features. 



