OF THE BUREAU OF ETHNOLOGY. LXXIII 



origin of such an art cannot be explained by the principle of 

 concausation, the presumption would be in favor of its origin 

 by acculturation. 



3. Institutions, languages, and opinions are not expressed 

 in material forms, and do not so easily pass from place to place 

 and from people to people. The presumption, therefore, is 

 that similarities discovered in these three classes of activities 

 are not derived by acculturation. 



4. When many similarities among two or more peoples are 

 discovered in institutions, languages, and mythic opinions, the 

 presumption is that they all have a common origin in some 

 ancient stock from whom the savage tribes have been derived. 



5. When similarities in institutions are discovered between 

 peoples not related in language, the presumption is that such 

 similarities are autogenous b) r concausation. 



6. When many verbal similarities are discovered among dis- 

 tinct peoples, the presumption is that they have a syngenous 

 origin by inheritance; when few verbal similarities between 

 different peoples are discovered, it becomes necessary to in- 

 quire into the history of the people to discover whether they 

 have their origin in acculturation or in adventition. 



7. When similarities in opinion are discovered among peo- 

 ples, if such peoples belong to different linguistic stocks the 

 presumption is that they have their origin in concausation. 



8. When similarities in opinions are discovered in peoples 

 of the same linguistic stock, it becomes necessary to inquire 

 into the history of the peoples and to determine the period of 

 their separation, and if such opinions are probably so primi- 

 tive that it is reasonably to be supposed that they were en- 

 tertained in the stage of culture in which the primitive stock 

 existed, the presumption is in favor of the theory that the simi- 

 larities are such by cognation. 



9. When similarities of opinion are discovered between peo- 

 ples speaking languages of the same stock, if such opinions 

 properly belong to a stage of culture subsequent to the sepa- 

 ration of a primitive stock, it is probable that such opinions 

 had their origin in concausation. 



3 eth VI 



