DREDGING AND HYDROGRAPHIO RECORDS. 

 Feanctsco Bay, Calif., 1912-13, and Mahch, 1914 — ('ontinued. 



67 



Temperature. 



F. 

 4Z73 



53 42.73 



52 43.23 



] 



52 '43.83 

 51 '44.93 

 51 45.53 



48 



49.00 



48 '49.001 

 48 49.00 



Salinity- 



a Surf. 



n 



F. 

 43.43 



43.43 



43.93 

 44.78 

 45.58 

 45.93 



12.28 



12.67 



15.23 

 1&41 

 24.13 

 27.72 



Dotm. 



48 



52 



52 



59 



49.00 



50.00 



50.00 



47. 73 47. 93 



17.20 



17.40 



20.43 

 22.74 

 26.62 

 24.39 



Apparatus. 



Ek. bot.; Tnr. 

 cse.,4'lnter.; 

 #12, #20; Alb. 

 smp. 



Ek. bot.; Tnr. 

 cse.;4'inter.i 

 #12, #20. 



....do 



....do 



....do 



....do 



Trial. 



Depth. 



Dura- 

 tion. 



o. p. dr. 



5'sldg. 



o. p. dr. 

 do.. 



surf, 

 and 

 botm 



...do.... 



...do. 

 ...do.... 

 ...do.... 

 ...do... 



botm.. 



-do.... 



.do. 



.do. 



5'sldg.. 

 o. p. dr. 



.do. 



28. 97 29. 82 



5'sldg.. 

 o. p. dr. 



Alb . smp . ; 

 Ek. bot.; 

 Tnr. cse.; 4' 

 inter.; #12. 

 #20. 



.do. 

 .do. 



Afin. 

 10 



13i 

 16 

 14 

 10 



Drift. 



Direction. 



Against 

 tide. 



...do 



...do 



...do 



...do 



...do 



.do. 



.do.... 

 .do.... 



surf, 

 and 

 botm. 



81° 



340° 



232 J ° 



Against 

 tide. 



3/;. 



Remarks. 



1.06 



1.07 



Ebb. 



Flood . Net towed 5 

 min. 



Flood. Net towed 3 

 min. 



Do. 



Flood . Net towed 4 

 min. 



Flood . Net towed 2 

 I min. 



O. p. dr. used at each 

 end, sledge trawl 

 through interven- 

 ing distance, 1.06 

 mi. Flood. Cable 

 out 40fms. 



'•A" includes two 

 dips with o. p. dr. 

 Neither gave full 

 load. Net of trawl 

 almost completely 

 ripped from frame. 

 Contents caught in 

 folds saved. At 

 "B"o. p. dr. more 

 than full. 



More than level full. 



O. p. dr. used at each 

 end , sledge trawl 

 through interven- 

 ing distance, 1.07 

 mi. Ebb. O. p. 

 dr. more than full. 



Cable out 30 fms. 



O. p. dr. 8-10 ins. 

 overfull. 



O. p. dr. used at each 

 end, sledge trawl 

 through interven- 

 ing distance, 1.06 

 mi. Ebb. O. p. 

 dr., 3 dips; last,* 

 full, only lot sifted. 

 1.06 I Cable out .10 fms. 

 Coaster meager 

 haul. 



O. p. dr. practically 

 empty, nothing 

 saved. 



Ebb. 



