FOREWORD 
The Bulletin of the Scientific Laboratoeies was estab- 
lished in 1885 by C. L. Herrick, who at that time filled the chair 
of Geology and Natural History” at Denison. Two years later 
it became the official organ of the Denison Scientific Association, 
and has since been edited by the ^Termanent Secretary” of that 
organization, a position occupied by various members of the 
science staff. The funds to support the publication have been 
provided by the Trustees of Denison in recognition of the fact 
that it is the province of the University not only to dispense 
information, but to enrich the store of human knowledge by 
original research and independent investigation. The pages of 
The Bulletin are open to contributions from the members and 
past-members of the Denison Scientific Association; articles sub- 
mitted for publication will be welcomed by the editor at any 
time. 
It is appropriate in this connection to acknowledge the in- 
debtedness of the University and the Scientific Association to 
Dr. Frank Carney, formerly Professor of Geology, who was editor 
of The Bulletin from 1908 to 1917. Volumes 14 to 18, inclu- 
sive, were issued under his direction ; they include more than half 
the total number of pages published since 1885. His editorial 
ability and facile pen did much to establish The Bulletin on a 
high plane of scientific excellence and to bring it the recognition 
in the realm of science, both in America and abroad, which it 
now enjoys. 
Clark W. Chamberlain. 
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