REPORT OF NATIONAL MUSIiUM, 1923. 39 



curator is to direct this expedition and Doctor Douglass will examine 

 and report upon its results. The chief purpose of the special re- 

 search is the collecting of tree-ring data from prehistoric ruins in 

 the southwestern United States. It is hoped that through this data 

 a means may be found of correlating such prehistoric ruins as 

 Pueblo Bonito, for example, with our own system of time meas- 

 urement. 



Dr. A. V. Kidder, of Phillips Academy, Andover, Mass., devoted 

 a week in early March to examination of the division's collections, 

 especially those recently obtained from prehistoric Pueblo Bonito, 

 noAV being excavated by the National Geographic Society. Doctor 

 Kidder also was much impressed by the collection of antiquities from 

 the Chaco Canyon pit house, having examined similar remains in 

 northern Arizona several years ago. 



Mr. Henry B. Collins, jr., member of the staff of the Pueblo Bonito 

 Expedition of the National Geographic Society, worked in the divi- 

 sion laboratories from October 1st to May 1st on the cultural mate- 

 rial collected by the Expedition. Mr. Collins also studied the 

 Museum collections from various southwestern states in order to 

 note the distribution of type specimens and the better to interpret 

 the numerous finds now being made at Pueblo Bonito. 



Mr. Lancaster, Park Engineer, Union Pacific Railroad system, 

 accompanied by the architect, spent some days examining the deco- 

 rations on the pottery of the southwestern United States with a view 

 toward using such decorations, or parts, in the tourists' hotels 

 which the railroad company contemplates building throughout that 

 section. 



In the division of Old World archeology a description of the 

 collections, to be used as a handbook, was completed by Doctor Casano- 

 wicz and the study of Shamanism taken up. A diagrammatic chart 

 of the exhibits of Old World archeology, useful as a guide to the 

 hall and to be reproduced in Doctor Casanowicz's handbook of the 

 collection, was prepared by George D. McCoy. 



The professors and the class in sociology of the Theological Semi- 

 nary at Alexandria, Va., made a study of the collections of Old 

 World archeology and of the religious sections. 



The past year was marked in the division of physical anthropology 

 by a substantial advance in the formation of a catalogue of measure- 

 ments of the crania in the collection. The first installment, contain- 

 ing measurements of approximately 700 skulls, is now being printed 

 by the Museum, and another equally large section is being completed. 

 In addition to the above the curator made further studies on the 

 morphology and dimensions of teeth in the various races. These 



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