166 RECORDS. 



with cinder cones on Volcano Creek, Cal. Lantern slides were 

 used to bring out these features and to illustrate the topography. 

 Professor Kemp said : Before giving an account of his work in 

 this region with Professor Knight, of Wyoming University, he 

 described the mineralogical and petrographical features of the 

 leucite rocks as they occur in America, and referred to their 

 discovery in Wyoming by the members of the Fortieth Parallel 

 Survey. These rocks were originally determined by Dr. Zirkel. 

 The speaker then called attention to Dr. Cross's more extended 

 work in the district. His own contribution had to do with the 

 general geology of the Leucite Hills. As many as seventeen 

 separate mesas and buttes isolated by erosion have been 

 mapped, representing in most cases single extrusive and intrusive 

 flows of these rare rocks. They are found in sandstones near 

 the top of the Cretaceous, and their distribution and field rela- 

 tions tend to confirm the view that they are volcanic outpourings 

 at different times from a laccolithic reservoir of great extent, 

 which is nowhere exposed at the surface. Lantern slides w^ere 

 used in illustrating the geology, and specimens of the rocks in 

 question were exhibited. 



George L Finlay, 

 Secretary, pro tan. 



SECTION OF ANTHROPOLOGY AND PSYCHOLOGY. 



February 23, 1903. 



The regular meeting of the Section was held February 23, 

 in conjunction with the New York branch of the American Psy- 

 chological Association, Professor Thorndike presiding. After- 

 noon and evening sessions were held, the members dining 

 together at the close of the afternoon session. The following 

 papers were presented : 



E. W. Scripture, Phonetic Surveys. 



Clark Wissler, Correlations of Measurements of Growth. 

 (Read by title.) 



J. H. Bair, Correlations in School Children. 



J. E. Lough, Apparent Motion in Stereoscopic Vision. 



