OKLAHOMA ACADEMY OF SCIENCE 155 



12. Watson, Mary A., 1901. Children's Vocabularies. Paidology, 

 Vol. L. pp. 227-237. 



13. Oatman-BIachly, Miriam E., 1922. Further Notes on Eigh- 

 teen-Months Vocabularies. Proceedings of the Oklahoma Academy 

 Oi Science, Vol, ii., pp. lO'i-lCx This paper enumerated the cases 

 collected to date. 



