MINUTES. vii 



Professor of Zoology, Bryn Mawr College (introduced by 



Dr. Donaldson). 

 " Malnutrition as a Cause of Irregularities in the Segregation 



of (Enothera brevistylis from Crosses with CEnothera La- 



marckiana," by Bradley M. Davis, Ph.D., Professor of Bot- 

 any, University of Michigan. 

 " Growth and Other Changes in Tree Trunks Measured by the 



Dendrograph." 

 " The Effect of Bases and Salts on the Hydration of BiocoUoids 



and Cell-Masses," by D. T. MacDougal, M.A., Ph.D., LL.D., 



Director of Department of Botanical Research, Carnegie In- 

 stitution of Washington, Tucson, Arizona. 

 "A Natural Group of Unusual Black Oaks," by William Tre- 



lease, Sc.D., LL.D., Professor of Botany, University of 



Illinois. 

 " The Grass Rusts of the Andes Based on Collections by Mr. 



and Mrs. Holway," by Joseph Charles Arthur, Sc.D., LL.D., 



Professor Emeritus of Botany, Purdue University, Lafayette, 



Ind. 

 " The Effect of Tension on the Electrical Resistance of Several 



of the More Unusual Metals," by P. W. Bridgman, Professor 



of Physics, Harvard University. 

 " Contributions to Dental Physiology," by William J. Gies, 



Ph.D., Sc.D., Professor of Biological Chemistry, Columbia 



University, 

 " The Ammono Carbonic Acids," by E. C. Franklin, Ph.D., 



Professor of Organic Chemistry, Stanford University. 

 Afternoon Session, 2 o'clock. 

 William B. Scott, Sc.D., LL.D., President, in the Chair. 

 Mr. Leonard E. Dickson, a newly elected member, subscribed the 

 Laws and was admitted into the Society. 

 The following papers were read: 

 "The Atomic Theory and Ideal Numbers," by L. E. Dickson, 



Ph.D., Professor of Mathematics, University of Chicago, 



which was discussed by Prof. Nipher. 

 "The ' Turtle-Oredon Layer' or 'Red Layer,' a Contribution 



to the Stratigraphy of the White River Oligocene." 



