BENiTOITE Oby 



The first of the two papers was published as pages 367-402 of this 

 vohime. 



The second paper was discussed by A. C. Lawson. 



On account of the special interest due to the excursion after the meet- 

 ing to the Grand Canyon of the Colorado, the following paper was, in the 

 absence of its author, read by C. W. Hayes : 



WIND EROSIoy IN THE PLATEAU COUNTRY 

 BY WHITMAN CROSS 



This paper has been published as pages 53-62 of this volume. 

 The next paper was read by title : 



ASSOCIATION OF PEGMATITE WITH HORNBLENDIC BORDER BEDS OF GRAN- 

 ITE AND THE APPEARANCE OF LARGE ISOLATED MASSES OF 

 THE TWO TOGETHER DEEP IN THE GROUND 



ET B. K. EMEESON 



The next paper was read by Mr. Louderback. It was 



BENITOITE: ITS MINERALOGY, PARAGENESI8, AND GEOLOGICAL OCCURRENCE 

 BY GEORGE D. LOUDERBACK AND W. C. BLASDALE 



[Abstract] 



Benitoite and the associated minerals were briefly described and chemical 

 analyses presented. The paragenesis and geological mode of occurrence were 

 discussed and compared with geologically related but mineralogically different 

 deposits in the same geologic province. 



The paper was discussed by W. G. Tight. 



The next papers were read by title, as follows : 



IGNEOUS ROCKS OF THE ORTIZ MOUNTAINS 

 BY IDA H. OGILVCE 



PRE-GLACIAL DRAINAGE IN CENTRAL WESTERN NEW YORK 

 BY AMADEUS W. GKABAU 



