RECORDS OF MEETINGS 345 



In the absence of the Secretary, Dr. Hovey was elected Secretary 

 pro tern. 



The minutes of the last meeting of the Section were read and 

 approved. 



The following programme was then offered: 



E. 0. Hovey, The Amalia Farm Meteorite. 



Vernon F. Marsters, A Sketch of the Physiography and Early 



Mining Developments of Peru. 

 Henry S. Washington, Eelations of the Feldspars, Lenads and 



A 7 E0LITES. 



George H. Girty, On Some Fossils of the Lykins Formation. 



(Eead by Title.) 



Summary of Papers. 



Dr. Hovey exhibited a polished and etched slice of the iron meteorite 

 from the Amalia Farm near Gibeon, Africa, and called attention to the 

 interesting curvature of the Widmanstatten lines in certain portions 

 of the slice, apparently due to the softening of the neighboring surface 

 of the mass as it passed through the air; also a line of discordance be- 

 tween the lamellse apparently due to welding by impact of two masses or 

 two fragments of the same mass before the meteorite reached the earth. 



Mr. Marsters in his paper described the coastal plains and Cordilleras 

 of Peru and gave sections at several points from the sea to the summit of 

 the eastern range of the Cordilleras, the petroleum deposits along the 

 coast and the great deposits of coal, Lake Titicaca and the mines of 

 gold, silver, copper and vanadium along the contacts of the eruptive 

 rocks with the sandstones and the shales of the middle and eastern 

 Cordilleras. 



Dr. Washington in his paper gave an ingenious regrouping of the 

 molecules in the standard analyses of the feldspars and related minerals, 

 bringing out the isomorphism of the groups more clearly than is done 

 by other methods of writing the formulas, provided one can admit that 

 silicon acts as a base as well as an acid. 



The Section then adjourned. 



Edmund Otis Hovey, 



Secretary pro tern. 



