APPENDIX. 7 1 



line pass through identical territory and may be considered together. 

 The drainage canal is accessible for its entire length on all of these 

 lines. Within the city limits, especially near Corwith (7), the develop- 

 ment of a new vegetation can be well studied on the great clay piles 

 along the canal (p. 48). From Summit (12) Xo Joliet (37) the railroads 

 follow the Desplaines river, as well as the canal, and at various points 

 the underlying limestone comes closer to the surface than is usually 

 the case, permitting the study of its influence on the vegetation (p. 44). 

 At Summit the Calumet beach shows the characteristic beach line vege- 

 tation (p. 64). At Willow Springs (18) is an excellent place for the 

 study of morainic forests (p. 47), ravines (p. 13), and flood plain vege- 

 tation (p. 22). The rock debris from the canal has an interesting 

 vegetation here also. At Sag Bridge (22), besides the morainic for- 

 ests, the difference between the well-drained plant societies along the 

 river and the poorly drained societies (p. 35) along the Feeder is well 

 shown. The vegetation of rock outcrops can be especially well seen 

 near Lemont (25). Along Fraction run, a mile south of Lockport (33), 

 are to be seen perhaps the best rockbound ravines near Chicago (p. ); 

 the beginnings of the flood plain vegetation are well shown here, as 

 well as the later stages along the river (p. 15). 



The Wabash railway, St. Louis line, passes through the usual 

 prairie district (p. 42) between Englewood (7) and Oak Lawn (15); at 

 this latter place the Calumet beach is crossed and the characteristic 

 trees may be seen (p. 64). Between Oak Lawn and Worth (18) the 

 Feeder is crossed, which shows the transitions between swamp and 

 prairie (p. 35). At Worth morainic forests occur, although this area 

 was submergecf in the earlier lake stages. South of Worth there are 

 more areas of swamp and prairie along a tributary of the Feeder, also 

 a beach line with the customary oaks. At Palos Springs (20) is one of 

 the finest places in the Chicago area for the study of all phases of 

 vegetation in a morainic region which has been eroded. About two 

 miles northwest of the station are to be seen all types of morainic for- 

 ests (p. 47) and morainic swamps (p. 40). All phases of river activity 

 from the ravine to the flood plain may also be studied here (p. 13). A 

 short distance north is the Sag, with its extensive swamps. At Orland 

 (24) and Alpine (27) the morainic societies are also well developed. 



The Chicago, Rock Island and Pacific railway crosses the Calu- 

 met beach at Washington Heights (13), at which point the oak vegeta- 

 tion is well developed (p. 64). This beach is followed to Blue Island 



