NOTE. 



The expense incurred in the preparation of this paper was 

 partly covered by a grant of forty dollars from the Emerson 

 McMillin Research Fund, and the expense of publication is met 

 by a further contribution from the same fund. 



WM. R. lyAZENBY, 



F. M. Webster, 

 John H. Schaffner, 



Trustees. 



