229 



Laxnont Geological Observatory, 

 Columbia University, 81, 82, 196, 

 199, 200, 202 



Listening -- see Acoustic Instru- 

 mentation 



Long-wave sensitive radiometer, 

 218 



Loran stations, 92 

 Lumetron model 402-E photometer, 

 182 



Magnetic tape recorder, 105 

 Magnetostriction, 7 

 Magnetometer, 81 

 Malkus bathypitotmeter, 21 

 Marine galvanometer, 166 

 Maritime Commission, 123 

 Mark I deep water wave recorder, 

 143 



Mark II deep water wave recorder, 

 143 



Mark V shore wave recorder, 148 

 Mark VI shore wave recorder, 148 

 Mark VIII shore wave recorder, 148 

 Mark IX shore wave recorder, 146 , 

 147, 155 



Mark IX telephone telemetering re- 

 ceiver, 155 



Massachusetts Institute of Technol- 

 ogy, 213 



MAUD Expedition, 94 

 METEOR, 220 

 Microbarovariograph, 80 

 Miller oscillograph, 78 

 Molecular filter, 40, 189 

 Micro-oceanographic gear, 66 

 Midwater trawl, 41, 50 

 Mimeograph paper, used in water 

 current studies, 27 



Nansen bottle, 40, 52 

 National Bureau of Standards, 172 

 National Research Council, 133 

 NAUTILUS, 87, 96 

 Navigational electronic gear, 86 

 Nekton, sampling of -- see Biologi- 

 cal Instruments 

 NEL snapper, 195 

 NMC echo-sounder, 197, 200 



Ocean Floor, Exploration of, 194- 

 209 



Acoustic methods, 197 



Acoustic methods, -- 



ball-breaker, 197, 

 Bottom temperature-gradient 

 recorder, 39, 208 

 Coring, 194 



Hvorslev-Stetson free-fall 



corer, 202 



Kullenberg piston corer, 42, 



194 



preservation of cores, 207 



12-24 inch diameter core, 



205 

 Direct sampling, 194 

 Dredges, 195 



clam shell bucket, 50 



deep-sea rock dredge, 195 



deep-water dredge, 42 



high-speed diving dredge, 



207 



orange peel dredge, 50 



pipe dredges, 196 

 Grab samplers, 42, 195 



Ekman grabs, 42 



NEL snapper, 195 



Peterson grab, 42, 195 



Ross snapper, 42 



snappers, 42, I95 



Holme's bottom sampler, 50 

 Underway samplers, 195 



Emery and Champion's 



Scoopfish, 195 



Pratje underway sampler, 



195 



Worzel's BT sampler, 195 

 Winches, 196 

 Wire rope, 196, 205 

 Visual methods, 198 



self-contained diving units, 



199 



underwater photography, 199 



underwater television, 199 

 Oceanographic Instrunnentation, 

 Considerations of, 1-12 



Characteristics of human 

 senses, 4 



Collecting instruments, 6 

 Effect of sea on instrumenta- 

 tion, 8 



Experience and understanding, 

 1 



Instruments and development of 

 knowledge, 2 



Measuring instruments, 7 

 Mental models, 3 

 Non-transfornning samplers, 6 

 Presentation of information, 1 

 Sensing elements, 7 



