534 PROCEEDINGS OF THE WASHINGTON MEETING 



The two papers were discussed by A. C. Lane, G. P. Merrill, W. H. 

 Hobbs, Whitman Cross, J. F. Kemp, A. C. Gill, and the Chairman, 

 B. K. Emerson. 



The fourth and last paper read in the Petrographic Section was 



NEPHELINE SYENITE AREA OF SAN JOSE, TAMAULIPAS, MEXICO 

 BY GEORGE I. FINLA.Y AND J. F. KEMP 



\_Ahstract1 



The San Carlos mountains, in the state of Tamaulipas, Mexico, are largely made 

 up of nepheline syenite. This rock is exposed for ten miles along the range south 

 of the town of San Jose. With it are associated syenite, dacite, and andesite in 

 the form of a laccolith, and dikes of tinguaite, camptonite, and diabase. The gen- 

 eral geology of the San Jose district is given, with a discussion of the field relations 

 of the above rock types. They were described petroojraphically, and their min- 

 eralogical and chemical relations treated in accordance with the scheme of classi- 

 fication outlined above. 



Remarks were made by J. P. fddings and H. S. Washington. 

 The paper will be found in full in the Annals of the New York Aca- 

 demy of Sciences for 1903. 



Session of Tuesday Evening, December 30 



The session was called to order at 8 o'clock p m in the banquet-room 

 of the New Willard Hotel by First Vice-President S. F. Emmons. 



The President of the Societ}^, Newton H. Wincbell, was introduced 

 and delivered the presidential address, entitled 



WAS MAN IN A 31 ERICA IN THE GLACIAL PERIOD? 



The address is printed as pages 133-152 of this volume. 



Following the address a " Smoker " was given b}^ the Geological So- 

 ciety of Washington to the Fellows of the Geological Society of America 

 and other visiting geologists. 



Session of Wednesday, December 31 



The Society met at 9.45 a m, Vice-President S. F. Emmons in the 

 chair. 



The Council report was taken from the table and adopted without 

 debate. 



