THE 



Ohio Journal of Science 



PUBLISHED BY THE 



Ohio State University Scientific Society 



Volume XVI NOVEMBER , 191 5 No. 1 



TABLE OF CONTENTS 



Introductory 1 



Lord — The Making of a Photographic Objective 3 



Transeau — Notes on the Zygnemales 17 



Organization of the Ohio State University Scientific Society 32 



INTRODUCTORY. 



Fifteen years ago the Biological Club of the Ohio State 

 University began publishing The Ohio Naturalist. This 

 Journal has had a continuous existence and has been an 

 important medium in advancing the knowledge of the natural 

 history of the state. A number of years ago the Naturalist 

 became the official organ of the Ohio Academy of Science and 

 was thus sent to every member of the Academy. At that time 

 the Ohio Academy was largely composed of Biologists and 

 Geologists, but has now widened its scope to include Physicists, 

 Mathematicians, and others. It was, therefore, thought desirable 

 by many that the scope of the Naturalist should be enlarged 

 so as to make it representative of all of the activities of the 

 Academy. In accordance with this desire, committees were 

 appointed by the various departments interested and a plan 

 for future publication was proposed which was finally adopted. 



The Ohio State University Scientific Society was thus 

 organized at the Ohio State University and will take over the 

 control of the new publication. This Society is to have some- 

 what the same relationship to The Ohio Journal of Science 

 as the Biological Club had to the Ohio Naturalist. The 



