Index 



Guadalupe Island, 7. 

 Helland-Hansen, B., estimate of error 

 in specific gravity, 39 ; cited on 

 proportion of salts in sea-water, 

 41. 

 Hydrobiological problems, complexity, 

 xvi-xxii; illustrations of, xvii, 

 xviii; limitations of oceano- 

 graphic expeditions, xix. 

 Hydrographie observations, subordi- 

 nate to biological ones, x; object, 

 256; locality, 256; method, 257; 

 use of contour maps, 257 ; must 

 be numerous, continuous, well dis- 

 tributed, 270. 

 Hydrographie Observations made by 

 the Scripps Institution for Bio- 

 logical Research of the Univer- 

 sity of California, 1908-1915, 

 Summary and Interpretation of, 

 255. 

 Hydrographie, Plankton, and Dredg- 

 ing Records of the Seripps Insti- 

 tution for Biological Research 

 of the University of California, 

 1901 to 1912, 1, (1913-1915), 207. 

 Hydrographie records, tabulation of 

 data (salinity, specific gravity, 

 temperature), 45-206, 217-254; 

 explanation of arrangement and 

 method, 45, 217; errors in, 18-25, 

 214-216; methods of making de- 

 terminations, XX, 28-32, of record- 

 ing, 17. 

 Ocean data, 49-111, 220-240, expla- 

 nation, 48, 218. 

 Data relative to San Diego Bav, 

 113-124, 241-242, explanation of 

 the tables, 112, 240. 

 Preliminary observations, 113- 

 118, explanation of the tables, 

 112. 

 Special bay data, 119-121, expla- 

 nation of the tables, 119. 

 Observations from Coronado Pier, 



120. 

 Observations to determine tidal 



effects, 121. 

 Miscellaneous, 123-124, explana- 

 tion, 122. 

 Gas Content, 125, Pox apparatus, 



125. 

 Soundings, 126, 127-132. 

 Field data, 133-198, 244-254; ex- 

 planations of tables, 133, 156, 

 194, 198, 243. 

 Plankton hauls, 133-193; varia- 

 bility of distribution in, 

 xviii. 

 Preliminary collections, 133- 



155. 

 Collections of quantitative sig- 

 nificance, 157-193. 

 Dredge hauls, 195-200. 



[ 



Sec also, Apparatus; Field Observa- 

 tions ; Isohalines ; Isotherms ; 

 Salinity. 



Hydrography, indispensable to under- 

 standing of marine organism, 

 xxii. 



Hydrometer method of determining 

 salinity, 30; calibration formula 

 31 ; compared with other.methods 

 37. 



International Commission for the In- 

 vestigation of the Sea., viii, xix, 



XX. 



Isohalines, methods of determining 

 259. 

 Distribution, 259, 264; direction of 



drift, 261. 

 Surface, illustrations of, opp. 300, 

 302, 304, 306, 308, 320, 322, 324. 

 West of the Coronado Islands, 263 ; 

 influence of temperature on dis- 

 tribution, 264. 

 See also Salinities. 



Isotherms, methods of determining, 

 259; distribution, 259, 260; direc- 

 tion of drift, 259, 260. 

 Surface, illustrations of, opp. 290, 

 292, 294, 296, 298, 308, 310, 312, 

 314, 316, 318. 

 West of the Coronado Islands, 263; 

 influence of temperature on dis- 

 tribution, 264. 

 See also Temperatures ; Salinities. 



Knudsen, M., reduction tables. 28. 



Knudsen and Sijrenson, method of 

 salinity determination, 27. 



Kofoid, C. A., acknowledgment, 4. 



Kofoid closing net, 11, 22, 201. illus- 

 trated, 12 ; errors arising in use 

 of, 22. 



Kofoid water bottle, 11, 14; attach- 

 ments, 212; illustrated, 213; de- 

 fective operation, 214. 



La Jolla, chosen as location of bio- 

 logical station, 6. 



Latitude, one minute of, in terms of 

 meters, 206. 



Latitude and longitude, methods of 

 determining, 18-20; sextant 

 method, 18; use of pelorus, 19; 

 ' ' dead-reckoning, ' ' 20. 



Laura, The, 6. 



Light intensity, distribution, 279 ; dia- 

 gram showing, with respect to 

 depth and time of day, opp. 356. 



Literature cited, xxiii, 43, 254, 280. 



Loma, The, 6. 



Longitude, one minute of, in terms of 

 meters, 205. 



Los Coronados Islands. See Coronado. 



McEwen, G. P., 1, 207, 255; acknowl- 

 edgment, 4. 



Marine Biological Association of San 

 Diego, 256. 



Marine Biology. Sec Biology, marine. 

 358] 



