PAPERS ON BOTANY 239 



6. Durrey, J. S. 



"The Trees of Evanston" pp. 63-64. 

 Plan of Evanston (1917). Small Parks and Playgrounds As- 

 sociation. 



7. Hall C. and Ingalls, O. D. 



Forest Conditions in Illinois. 



Bull. 111. State Lab. Natural History, Vol. IX, Art. IV. Jan. 

 1911. 



8. Heminway, W. O. 



Oaks are Oldest Residents. 



Evanston News Index, Sept. 5, 1903. 



9. Leverett. F. 



Pleistocene Features and Deposits of Chicago Area. Chi. Acad. 

 of Sci.. Bull. II. 



Geol. and Nat. History Survey (1897). 



10. Salisbury. R. D., and Alden. W. C. 



The Geography of Chicago and Its Environs. 

 Geographic Society of Chicago. Bull. I. 1S9S. 



11. Schmoll. H. M. 



Ecological Survey of Forests in the Vicinity of Glencoe, 111. 

 Master Thesis, 1919. 



12. Sherff, E. E. 



The Vegetation of the Skokie Marsh, with Special Reference 

 to Subterranean Organs and Their Relationships. 

 Botanical Gazette, Vol. 53, pp. 415-435, (1912). 



13. Ullrich, F. T. 



The Relation of Evaporation and Soil Moisture to Plant Succes- 

 sion in a Ravine. 



Bull. 111. State Lab. of Nat. Hist. No. 12, (1915). 



14. Willard. Frances, and Norton, M. B. 



A Great Mother (1S94) pp. 63-64. 



DISTRIBUTIOX OF OAKS OX THE LAKE CHI- 

 CAGO BAES IX EVAXSTOX AXD XEW 

 TEIEE TOWXSHIPS 



W. G. "Watebman, Noethwestekx Uxiveesity 



This study originated in a class exercise in Forest 

 Ecology, largely on account of the abundant fruiting of 

 the red-black oaks in the sunnner of 1919. Interest was 

 aroused by the large number of ellipsoid acorns observed 

 and it was decided to investigate the relative number of 

 specimens of Q. ellipsoidalis in comparison with those 

 of the other species found in this region. It was also 

 decided to study the relative distribution of the ellipsoid 



