IV 



proper comprehension of the subjects and methods of investigation apper- 

 taining to this branch of scientific research. For this reason a series of 

 pamphlet publications, designed to give assistance and direction in these 

 investigations, has been commenced. 



The first of the series was prepared by myself and issued under the 

 title of " Introduction to the Study of Indian Languages ;" the second is 

 the present, upon Sign-Language ; and a third, by Dr. H. C. Yarrow, United 

 States Army, designed to incite inquiry into mortuary observances and 

 beliefs concerning the dead prevailing among the Indian tribes, will shortly 

 be issued. Other publications of a like character will be prepared from 

 time to time. These publications are intended to serve a somewhat tempo- 

 rary purpose until a manual for the use of students of American Anthro- 

 pology is completed. 



J. W. POWELL. 



