XLVI REPORT OF THE BUREAU OF ETHNOLOGY 



social institutions, of primitive peoples are dependent on a lim- 

 ited number of factors, including (1) individual and tribal 

 environment, and (2) individual and collective modes and 

 habits of thought. Now, the first of these factors has received 

 the attention of nearly all investigators, while the second has 

 received much less consideration and is frequently ignored. 

 Accordingly, it has been thought, desirable to undertake the 

 investigation of intellectual method for the purpose of devel- 

 oping the principles of psychology, and thus affording a more 

 definite basis for the researches in mythology and sociology. 

 To this subject the Director has devoted a considerable part 

 of the year, and a tentative system of psychology, which prom- 

 ises to guide further researches, has been formulated. 



EXPLORATION 



The Director spent several weeks in ethnolog'ic exploration 

 on the Northern Pacific slope. The territory lying between 

 the Sierra Nevada and the Pacific is of exceptional interest to 

 ethnologists by reason of the remarkable number of independ- 

 ent linguistic stocks crowded into a relatively small area; 

 three-fourths of the distinct groups of peoples in this country, 

 and fully half of all known on the western hemisphere, are 

 found in this territory. The northern part of the tract has never 

 been explored by students; and in the hope of discovering 

 additional stocks among the remaining tribes, as well as in the 

 hope of gaining additional knowledge concerning the origin 

 of this remarkable diversity of languages, an exploratory trip 

 was planned. The results of the observations are incorporated 

 in reports now in course of preparation for the press. Mr Hen- 

 sliaw, in southern California, and Mr Moonev, in the northern 

 Rocky Mountain region, also penetrated areas and encountered 

 Indians not previously seen by scientific students. 



MISCELLANEOUS WORK 



As incidentally noted in preceding paragraphs, some time 

 and thought have been given to the installation of an ethno- 

 logic exhibit in the World's Columbian Exposition at Chicago. 



