10 University of California Publications in Zoology [ Vou. 14 
into San Francisco Bay, as well as the methods employed in computing 
this. We have also to thank Mr. McGlashan for the loan of a Price 
current meter during the early phases of our work. 
The determination of nitrogen in sixty mud samples from the bay 
was made through the courtesy of Dr. C. L. Alsberg, Chief of the 
Bureau of Chemistry of the United States Department of Agriculture. 
Acknowledgments will be made, at the proper time, of the services 
of those zoologists and botanists who have given their time to the task 
of identifying the various collections. 
The senior author of this report, as naturalist of the ‘‘ Albatross’’, 
has had general supervision of the field work of the vessel, the dis- 
position of the material collected and other executive duties relating 
to the conduct of the survey. He has likewise superintended the com- 
pilation of the data herewith published and has written the present 
report as a whole. 
Professor Louderback has in a large degree prescribed the methods 
which have been followed in the examination of the bottom samples, 
and has, to a considerable extent, supervised the laboratory analyses 
of these samples, as well as making a personal study of them. He 
will independently prepare a more complete report upon the bottom 
samples, when these have been subjected to further study. 
Messrs. Schmitt and Johnston, of the scientific staff of the ‘‘ Alba- 
tross’’, have had immediate charge of the field collecting and hydro- 
eraphie observations on the greater number of days, after the earlier 
operations of the survey. They have also performed nearly all of the 
titrations of the sea water, and most of the laboratory work involved 
in the analysis of the bottom samples. To their lot, likewise, has 
fallen the larger part of the tedious computations necessary for the 
presentation of these results in generalized form. Their share in the 
work is far from having been purely mechanical, and they are there- 
fore justly entitled to rank among the joint authors of the present 
report. 
Mention must also be made of the important services of the clerk 
of the ‘‘Albatross’’, Mr. R. A. Coleman, who has carried out with 
much care and precision a considerable part of the statistical work 
necessary for a proper treatment of the physical data. 
The various curves for temperature and salinity, as well as the 
three charts (pls. 5, 6, 7) giving the results of the bottom analyses, 
are the work of Mr. Samuel Laverty, a student in the College of Civil 
Engineering of the University of California. 
