THE UNIVERSITY OF OKLAHOMA 



XVT. A study of Some Conglomerates near the Eastern 

 Limits of the Red Beds of Oklahoma. By O. F. Evans. 



XV n. Notes on the Area Lying Between the Northwestern 

 Edge of the Arbuckle Mountains and the Wildhorse 

 Sandstone. By E. R. Brockway and H. J. Owen. 

 XVId. Phosphate Rocks in Oklahoma. By A. C. Shead. 



XrX. Notes on a Barite in Oklahoma with Chemical Analyses 

 of Sand Barite Rosettes. By A. C. Shead. 

 XX. "Drillite" and its Signiiirance to iue Geologi.st. By 

 A. C. Shead. 



XX r. Notes on the Black Mesa Basalt. By A. C. Shead. 



XXII. Building Materials of Oklahoma. By M. C. Oakcs. 



XXIII. A Preliminary Interpretation of Ceriain Pecularities of 



the North and South Canadian River Basins in the 

 Red Beds Plains Area of Oklahoma. By C. J. Bollinger. 



XXIV. Some Observations on the South Canadian River near 



Norman. By O. F. Evans. 



XXV. Buried Mountain Ranges in Oklahoma. By Charles N. 



Gould. 

 XXVI. Indian Pictographs in the WichHa Mountains. By S. 

 Weidman. 



PHYSICS 



XXVII. Present Day Objectives in Physics. By Homer L. Dodge. 



XXVIII. The Cause of the Optimum Angle in a Receiving Conical 



Horn. By Victor A. Hoersch. 

 XXIX. An Electrometer for Measuring the Radioactivity of 



Gases from Oil and Gas Wells. By F. K. Harris. 

 XXX. Sources of Direct Current in High School Laboratories. 



By B. C. Brouse. 



PSYCHOLOGY 

 XXXI. A Boy's Vocabulary at Eighteen Months. By George 



F. Miller, Margaret D. Miller and Margaret M. Nice. 

 XXXII An Experiment in Automatic Spe'i.iig. By Herbert 



Patterson. 



XXXIII. The Magnetism of the Map By Sophie Ravitch Altshil- 



ler Court. 



XXXIV. A Comparison of the Sizes of the Vocabularies of 



Fifty Children of the Same Age. By Miriam E. Oat- 

 majti-Blachly. 



