RECORDS OF MEETINGS OF 1909 
313 
simple design on copper by hammering or etching, he discussed the more 
intricate work of hammering and then took up soft and hard soldering and 
the building up of jewelry, etc. 
Dr. Campbell described and showed by lantern slides the structures of 
pure metals and the changes brought about by rolling, hammering and 
annealing. Then he showed the structure and constitution of the soft 
soldars, brasses, bronzes, german silvers, the coinage and jewelry alloys and 
finally some of the white metals for castings, comparing structure with physi¬ 
cal properties. 
Professor Hering showed an experiment on Newton’s rings. A pair of 
circular glass plates were fitted into a holder with binding screws whereby 
the pressure could be changed at will. The rings therefrom were projected 
on the screen by the lantern, and then moved by changing the pressure. 
The Section then adjourned. 
William Campbell, 
Secretary . 
SECTION OF ANTHROPOLOGY AND PSYCHOLOGY. 
October 25, 1909. 
Section met in conjunction with the American Ethnological Society at 
8:15 p. M., Vice-President Fishberg presiding. 
The minutes of the last meeting of the Section were read and approved. 
The following programme was then offered: 
Robert H. Lowie, The Age-Societies of the Plains Indians. 
Leo S. Frachtenberg, Notes on Coos Ethnology. 
Summary of Papers. 
Dr. Lowie distinguished between the genuine feasting age-societies 
of old, middle-aged and young men found among the Omaha and the cere¬ 
monial age-groups of the Arapaho, Gros Ventre, Blackfoot and Village 
tribes. The latter do not seem to correspond to fundamental age divisions, 
so that some other character of as yet problematic character must be assumed 
to have entered into their development. The lecturer insisted that these 
ceremonial organizations cannot be classified on the basis of single char- 
