$d&. 73 
VV7 VV4S 
TRANSACTIONS 
OF THE 
WISCONSIN ACADEMY 
OF 
SCIENCES, ARTS, AND LETTERS 
VOL. XII, & s s?m 
WITH ONE PLATE 
EDITED BY THE SECRETARY 
Published by Authority of Law. 
MADISON, WIS.: 
Democrat Printing Compa^v State p RINTER 
