TITLES OF PAPERS 181 



SERICITE, A LOW-TEMPERATURE HYDROTHERMAL MINERAL 

 BY A. F. ROGERS 



Presented in full extemporaneously. 



At 5 p. ni. the session adjourned, to meet at the University of Cali- 

 fornia at 10 a. m. August 5. 



ANNUAL DINNER 



The annual dinner was held jointly hy the Geological, Paleontological, 

 and Seismologieal Societies, at the Engineers' Club, San Francisco, at 

 7.30 p. m. 



Session of Thursday, August 5 



The Society was called to order at 10 a. m., in Bacon Hall, University 

 of California, by Chairman C. F. Tolman, Jr., and the following papers 

 were read : 



PHYSIOGRAPHIC CONTROL IN THE PHILIPPINES 

 BY WARREN D. SMITH 



Iiead in full from manuscript. 



Discussed by E. A. Daly, A. C. Lawson, C. F. Tolman, Jr., and Wm. 

 H. Hobbs. 



In reply to inquiry. Dr. Smith stated that the valleys were V-shaped 

 and contained no soil. 



ORIGIN OF THE BASINS WITHIN THE HAMADA OF THE LIBYAN DESERT 

 BY WILLIAM H. HOBBS 



Presented extemporaneously. 



THE LIMITED EFFECTIVE VERTICAL RANGE OF THE DESERT SAND-BLAST, 



BASED ON OBSERVATIONS MADE IN THE LIBYAN DESERT 



AXn IN THE ANGLO-EGYPTIAN SUDAN 



BY WILLIAM H. HOBBS 



Presented extemporaneously. 



DIASTROPHISM OF THE PACIFIC COAST 

 BY R. S. HOLWAY 



Presented in full extemporaneously by the author and supplemented l)y 



