1914} Sumner, et al.: Physical Conditions in San Francisco Bay — 129 
APPENDIX I 
‘CALBATROSS’’ DREDGING STATIONS IN AND NEAR SAN FRANCISCO 
BAY, 1912-1913. (Ineluding stations dredged with a launch). 
The bearings given for the stations in this table represent the 
position of the vessel at the commencement of each dredge-haul, as 
recorded in the ship’s log. The positions of the stations, as plotted in 
the charts (plates 1 and 2), have, however, been more carefully verified 
than the recorded bearings, and if any discrepancy should be found 
between the two, the presumption is that the charts are correct. 
For greater convenience in locating these stations, they have been 
referred to the “‘upper,’’ ‘‘middle’’ or ‘‘lower’’ regions of the bay 
(see pp. 22, 23 for limits), or to the region outside the Golden Gate, 
where 17 dredge-hauls were made. 
Unless otherwise specified, the ‘‘ Albatross’? was employed in 
dredging at these stations; in shoal waters, however, a launch was 
used. The position was determined at the beginning and end of each 
haul, and occasionally at intervening points, the ‘‘station’’ being 
plotted on the chart as a line connecting two or more cireles. An 
arrowhead commonly indicates the direction of the haul. For the 
larger number of stations, the contents of the dredge or trawl repre- 
sented material which might have been taken throughout the whole 
length of this line. 
In the case of most stations dredged with the launch (e.g., no. 5747) 
this line was gone over twice in opposite directions, one form of dredge 
(or trawl) being used in the first haul, another in the second. Ordin- 
arily, the material derived from these two hauls was preserved 
separately, the label bearing the station number, followed by A or B, 
denoting the first and second hauls respectively (occasionally C, when 
a second repetition was made). These letters do not appear in the 
present table nor in the charts. They must not be confused with the 
letters referred to in the next paragraph. Bottom samples from these 
stations were derived from the dredge-hauls only. 
In the case of a considerable number of stations (nos. 5815, ete.), 
the ‘‘orange-peel bucket’’ was used at each end (‘‘A’’ and ‘‘B’’), 
the 5-foot ‘‘sledge-trawl’’ being hauled through the intervening dis- 
tance. The material from each of these stations was accordingly pre- 
served in three separate lots. It was our endeavor to save all of the 
