10 RECORDS 



The mines are worked now as open-air diggings in circular 

 terraces. They produce about two million tons of ore per year, 

 and it is estimated that there are one hundred and sixty million 

 tons in sight. Some silver-bearing galena is associated with the 

 copper ore. The old-fashioned method of roasting the ore 

 in heaps was kept up until 1893, but the ore is now leached by 

 means of water. This is a long process, requiring four years 

 for its thorough completion, but the copper is leached out so 

 that less than one fourth of one per cent, is left in the tailings. 

 The great bulk of the world's supply of sulphuric acid is ob- 

 tained from the Rio Tinto pyrite, which is shipped all over the 

 world for the purpose of manufacturing the acid. Five hundred 

 thousand tons per year are utilized in this way. 



The paper was discussed by Dr. Julien and Mr. Howe, and 

 the section passed a hearty vote of thanks to Professor Douglas 

 for his kindness in giving the paper. 



Edmund O. Hovey, 



Secretary. 



SECTION OF ANTHROPOLOGY AND PSYCHOLOGY. 



January 27, 1902. 



Section met at 8:30 P. M., Professor Farrand presiding. The 

 minutes of the last meeting of Section were read and approved. 



After opening the meeting, the chairman called on General 

 James Grant Wilson to preside. 



The following program was then offered : 



F. S. Dellenbaugh, The Location of Historic Towns and 

 "Nations" of New Mexico prior to 1630. 



Harlan I. Smith, A Recently Discovered Earthwork in 

 Ogemaw County, Michigan. 



John R. Swanton, Mythology and Origin of the Haida 



Indians, 



Summary of Papers. 



Mr. F. S. Dellenbaug-h explained his understanding of the 

 location of the historic towns and "nations " of the Rio Grande 

 valley in New Mexico prior to 1630. This differs radically 



