PREFACE 
Volume XII is made available through the thoughtful care of 
Dr. F. W. Simonds, who preserved a few undistributed copies 
of Part II and the plates for Part I. 
Part I was published as a University bulletin and in that 
form delivered to the members of the Academy. Because of the 
demand made for Volume XII by libraries and individuals 
Part I has been reprinted. The illustrations are from the original 
plates. In so far as is known the present volume contains all 
that was in the original. 
H. B. PARKS, Secy.-Treas. 
June, 1931. 
