



Publications of the University of Texas 



Publications Committee : 



Frederic Duncalf C. T. Gray 



Killis Campbell E. J. Mathews 



D. B. Casteel C. E. Rowe 



F. W. Graff A. E. Trombly 



The University publishes bulletins six times a month, 

 so numbered that the first two digits of the number show 

 the year of issue, the last two the position in the yearly 

 series. (For example, No. 1701 is the first bulletin of the 

 year 1917.) These comprise the official publications of the 

 University, publications on humanistic and scientific sub- 

 jects, bulletins prepared by the Bureau of Extension, by the 

 Bureau of Government Research, and by the Bureau of Eco- 

 nomic Geology and Technology, and other bulletins of gen- 

 eral educational interest. With the exception of special num- 

 bers, any bulletin will be sent to a citizen of Texas free on 

 request. All communications about University publications 

 should be addressed to University Publications, University 

 of Texas, Austin. 



