Abstract of History. xxix 



E. A. Hall. — Fixation of Atmospheric Nitrogen. 

 S. S. Knight. — Some Microscopic Observations upon 



the Segregation of Impurities in Carbon-Iron 



Alloys. 

 R. J. Terry. — The Development of the Cranium in 



Mammals. II. 



March 17, 1913 : 



E. G. Payne. — Social Effects of Some Recent Child 



Labor Legislation in Missouri. 

 C. M. Gill. — A Possible Explanation of the 'In- 

 ferno ' at Fern Lake near Estes Park, Colorado. 



F. E. Nipher.— The Effect of Wind on the Magnetic 



Needle. 



April 7, 1913 : 



G. 0. James. — How Worlds are Formed. 

 Julius Hurter. — Cobras. 



April 21, 1913 : 



B. M. Duggar. — The Significance of Color in Plants. 



C. A. Todd. — Observations on the Migratory Flight, 



of a Butterfly. 

 R. A. Hall. — Preparation of Neutral Tri- Ammonium 

 Citrate. 



May 5, 1913 : 



M. E. Wilson. — The Geology of the Meramec High- 

 lands Region. 



C. A. Todd. — Further Observations on the Migra- 

 tory Flight of a Butterfly. 



May 19, 1913 : 



Geo. T. Moore. — Speculations on the Origin of Life. 



June 2, 1913 : 



Hermann von Schrenk. — Recent Epidemic Appear- 

 ance of Termites in St. Louis Houses. 

 H. M. Whelpey. — The Shrunken Human Heads of 

 Bolivia. 



