SONIC DEPTH WORK 



53 



Table 2. Amounts to be added to correction factor because of pressure effect 



Depth 



in 

 meters 



Tempera- 

 ture, °C 



From 



To 



Amount 



Depth 



in 

 meters 



Tempera- 

 ture, °C 



From 



To 



Amount 



Depth 



in 

 meters 



Temperature, C 



+ 1 



Table 3. Specimen determination of correction factors 

 Station 93; latitude 14°4i:3 south, longitude 167°40:8 west; Sunday, March 31, 1929; Comp. F.M.S. 



D 



Vel. 

 corr. 



Mean corr. of layer 



25 



100 



500 



Sum 



of 



means 



These values and all values below heavy line by extrapolation. 



Corr. 

 fact. 



