UNIVERSITY OF CALIFORNIA PUBLICATIONS 



IN 



ZOOLOGY 



Vol. 15, No. I, pp. 1-206, 4 text figures and map July 15, 1915 



HYDROGRAPHIC, PLANKTON, AND DREDGING 

 RECORDS 



OF THE 



SCRIPPS INSTITUTION FOR BIOLOGICAL 

 RESEARCH 



OF THE 



UNIVERSITY OF CALIFORNIA 

 1901 TO 1912 



COMPILED AND ARRANGED UNDER THE SUPER\T:SION OF 

 W. E. RITTER 



ELLIS L. MICHAEL 

 Zoologist and Administrative Assistant 



GEORGE F. McEWEN 

 Hydrographer 



CONTENTS 



PAGE 



Introduction 3 



Part I. Description of apparatus and methods of work 5 



A. Events leading to the present location and methods of work 5 



1. Brief historical resume 5 



2. The region to be surveyed 7 



B. The "Alexander Agassiz" and methods of collecting 8 



1. The boat itself 8 



2. The collecting apparatus 9 



(o) The surface nets 9 



(6) The Nansen closing nets 10 



(f ) The Kofoid closing net '. 11 



(d) The sub-surface pump 11 



