227 



Centrifugal plankton pump, 38, 49 

 CHALLENGER, 10 

 Chemical Measurements, 166-193 

 Chlorinity- salinity -density 

 measurements, 167 



automatic chlorinity titrator, 

 J77, 189 



automatic potentiometric ti- 

 tration apparatus, 177 

 calibration systems, chemi- 

 cal, 172 



conductivity- temperature- 

 depth recorder (CTD), 65 

 66, 171, 186 



conductivity- temperature 

 indicator (CTI), 173, 186 

 high-frequency oscillators, 

 177 



Knudsen method, 167, 187 

 recording salinity meter, 

 171 



salinity measurements in 

 air-sea boundary processes, 

 217 



salinity- temperature -depth 

 recorder (STD), 172, 186 

 salinometer for brackish 

 water, 174 



Wenner bridge, 172, 187 

 Colorimeters (and spectro- 

 photometers), 181 



automatic servo-operated 

 photometer (ASOP), 182 

 Beckman model DU spectro- 

 photometer, 182 

 electric eye photometer 

 (EEP), 183 

 Hehner tubes, 181 

 Wattenberg comparator, 181 

 Concentration techniques, 183 

 chromatographic columns, 

 184 



ion exchange resins, 184 

 Polarographic measurements, 

 185 



seagoing polarographic in- 

 strument, 186 

 Radiochemical measurements, 

 185 



Special shipboard devices, 186 

 automatic reagent dispenser, 

 186 

 Spectrophotometers (and colori- 

 meters), 181 

 Chesapeake Bay Institute, The 

 Johns Hopkins University, 30, 166, 

 169, 175, 182, 183 



Chlorophyll measurements in bio- 

 logical studies, 40, 49 

 Chromatographic methods, 7, 193 

 Circulation Measurements, 13-30 

 Buoys 



anchored, as ocean stations, 

 16 



drifting, 18 

 Currents, 21-30 



acoustic methods, 30, 113, 

 120 



deep currents, 22 

 electromagnetic methods, 226 

 estuarine, 23 

 geologic problems, 23 

 pitot-type current meter, 21 

 sub-surface current record- 

 ers, 140 



wind-driven surface cur- 

 rents, 21 

 Steady and transient states, 15 

 Chlorinity- salinity -density meas- 

 urements, 167 

 Clam shell bucket, 50 

 Clarke-Bumpus sampler, 38, 48 

 Colorimeters (and spectrophoto- 

 meters), 181 



Columbia University, 79, 80, 202 

 Concentration techniques, chemi- 

 cal, 183 



Conductivity -temperature -depth 

 indicator (CTD), 65, 66, 169, 186 

 Conductivity- temperatui^e indica- 

 tor, (CTI), 65, 66, 169, 186 

 Continuous centrifuge, 49 

 Cores and Coring -- see Ocean 

 Floor, exploration of 

 Cross correlator, 113 

 Crystal chronometer, 81 

 Current cross, 20, 21 



Damipling disk, in wave recording, 

 142 



Deep currents, measurement of, 22 

 Deep-scattering layer, 43, 109 

 Deep-sea pressure recorder, 80 

 Deep-sea rock dredge, 195 

 Deep-water dredge, 42 

 Deep water Mark III wave record- 

 er, 144 



Demolition block, Mark IV, 109 

 Depressor, 39, 88 

 Depth charge, in acoustic studies, 

 109 

 Depth flow meter, 39 



