TABLE OF CONTENTS. 



PAGE 



Officers and Committees fob 1923-1924 8 



Past Officers of the Illinois State Academy of Science 9 



Minutes of Coun< el Meetings 11 



Minutes of the Sixteenth Annual Meeting. Galesburg 15 



Treasurer's Report 15 



Papers Presented at General Sessions: 



Studying Mines with a Microscope. W. S. Bayley, University 



of Illinois 27 



The Present Status of Evolution. The Botanists' View. John 



M. Coulter, University of Chicago 29 



The Zoologist's View of Evolution. Charles Zeleny, University 



of Illinois 37 



The Paleontologist's View of Evolution. T. E. Savage, Univer- 

 sity of Illinois 39 



A Novel and Economic Method of Making Charts for Science 

 Instruction. William W. Wesley, St. Procopius College, 

 Lisle 43 



A State Forest Preserve. James H. Ferriss, Joliet Park Dis- 

 trict 46 



A Collecting Trip to Alaska and the Canadian Northwest. 



Ruth Marshall, Rockford College 51 



A Tundra Trip in Alaska. Patsy Hughes Lupo, Rockford Col- 

 lege 54 



Papers on Biology and Agriculture: 



Practical Plant Protection. Willard N. Clute, Editor, American 



Botanist, Joliet 67 



Mytilaspis Citricola and Other Scale Insects. Wesley N. Speck- 

 man. Elmhurst College 74 



Opportunities for Botanical Research in Central America. J. 



M. Greenman, Botanical Gardens, St. Louis, Mo 76 



A Comparison of the Transpiration Rates of Corn and Certain 

 Common Weeds. Helen A. McGinnis and W. B. McDougall, 

 University of Illinois 82 



The Determination of the Age of Fishes from Scale Character- 

 istics, Frank Smith, University of Illinois 89 



Seedling Vascular Anatomy of Nelumbo Lutea. Isabel S. 



Smith, Illinois College. Jacksonville 91 



The Brain of Coenolestes Obscurus. Jeannette Brown-Oben- 



chain, University of Chicago 100 



Study of Egg Laying and Feeding Habits of Galerucella 



nymphaeae. Helen M. Scott, Knox College 107 



The Anatomy of a Double Monster Pig. George M. Higgins, 



Knox College Ill 



The Nasal Capsule in Natrix Cyclopion. Nina Wicks, Knox 



College 122 



The Nasal Capsule in Bufo Americana. Frances Grassley, 



Knox College 130 



