Record. xxiii 



May 18, 1908: 



LiNDLEY Pyle. — Measurement of tlie Acceleration of 

 a Freely Falling Body. 



June 1, 1908: 



S. A. Douglass. — The Electric Furnace in Industrial 

 Chemistry. 



October 19, 1908: 



A. S. Langsdorf.^ — Fatigue of Insulation. 



(Published in Electrical World, Vol. LII., Oct., 1908.) 



November .2, 1908: 



H. M. Whelpley. — Cranial Surgery among the 

 Primitive Eaces. 



November 16, 1908: 



E. J. Swift. — How We Learn to Do Things. 



(Published in "Mind in the Making," Scribners, 1908.) 



December 21, 1908: 



J. N. Baskett. — Heads and Tails in Nature. 



January 4, 1909: 



C. A. Waldo. — What a Volcano is Doing. 



January 18, 1909: 



Wm. H. Eoevee. — Optical Interpretation of Some 

 Problems in Statics. 



February 1, 1909 : 



GusTAV Baumgarten. — The Personality of Engel- 



mann. 

 H. A. Wheeler. — Engelmann's Contribution to 

 Geognosy. 



F. E. NiPHER. — Engelmann's Work in Meteorology. 

 Wm. Trelease. — Engelmann as a Biologist. 



February 15, 1909: 



S. M. Coulter. — Darwin as a Naturalist. 

 W. E. McCouRT. — Darwin's Influence upon Geology. 

 J. F. Abbott.— The Natural Selection Theory and 

 Its Latter Day Critics. 



