UNIVERSITY OF CALIFORNIA PUBLICATIONS 



ZOOLOGY 



Vol. 6, No. 9, pp. 189-204, 1 text-figure and map May 28, 1910 



CONTRIBUTIONS FROM THE LABORATORY 



OF THE 



MARINE BIOLOGICAL ASSOCIATION OP SAN DIEGO. 

 XXIX. 



PRELIMINARY REPORT ON THE HYDRO 



GRAPHIC WORK CARRIED ON BY THE 



MARINE BIOLOGICAL STATION OP 



SAN DIEGO. 



GEORGE P. McEWEN, 

 Physicist of the Station. 



The idea of a "Biological Survey of the Waters of the Pacific 

 adjacent to the Coast of Southern California," set forth in the 

 articles of incorporation of the Marine Biological Association of 

 San Diego as the main reason for the existence of that organiza- 

 tion, has from the outset included, as an integral part of its 

 program, hydrographic as well as biological investigations. 



Although a considerable number of observations on temper- 

 ature and density have been made, beginning with the summer 

 of 1901, 1 the resources of the Station did not permit the work 



i During June and July, 1901, Professor W. J. Raymond of the Depart- 

 ment of Physics, University of California, made a considerable number of 

 both temperature and density determinations on the water about San Pedro. 

 Since then Professor Skilliug of the State Normal School of San Diego lias 

 done some work for the vicinity of San Diego Bay. Furthermore many 

 temperatures have been taken from time to time by different persons con- 

 neeted with the laboratory. These data air all on record and may be put 

 in shape for publication some time should this seem desirable. 



