DESCRIPTION OF A 



G NET, THE NANS EN 45 CM 



COEFFICIENT' OF A 



BY A PLANKTON + ON THE 



NET. DISCUSSION OF 



OF SAMPLING ERROR, 



VARIABLES AFFECTING THE 



- + DISCUSSION OF THE 



OPENING OF A NET, THE 



DISCUSSION OF THE 



ON MEASURING OF THE 



DISCUSSION OF THE 



TCHING ABILITY, AND THE 



ED FOREWARNING, AND THE 



N OF SAMPLING ERROR AND 



NG ERROR, CLOGGING, AND 



DURING THE TOW, THE 



OF AVOIDANCE, 



NET WITH REGARD TO 



OF SAMPLING ERROR, 



, + DISCUSSION OF THE 



AND DISCUSSION OF THE 



METHOD. DISCUSSION OF 



METER FOR MEASURING THE 



DEPTH SAMPLED , 



DETERMINATION OF THE 



WITH AN 8 LITRE 



IONS.- A SELF-CLOSING 



PLANKTON NETS WITH A 



COMPARISON OF THE 



OF TOWING SPEED, TOWING 



LENGTHS OF TOWING 



ETS. DISCUSSION OF 



WING PLANKTON NETS.- A 



DESCRIPTION OF THE 



THE BRUT-NETZ, AND THE 



THE HELIGOLAND OTTER 



EGG NET, THE HELIGOLAND 



VA NET AND THE PETERSEN 



ING ERROR OF PETERSEN'S 



OF THE HELIGOLAND 



OF THE HELIGOLAND 



NET, REFERRED TO AS A 



VERTICAL- CLOSING MODIFICATION OF 



VERTICAL CLOSING NET, AND THE JUDAY 



VERTICALLY DESCENDING NET, AND ON 



VOLUME MEASUREMENT OF WATER FILTERED 



VOLUME OF WATER FILTERED 



VOLUME OF WATER FILTERED AND AVOIDAN 



VOLUME OF WATER FILTERED AND COMPARI 



VOLUME OF WATER FILTERED AS 



VOLUME OF WATER FILTERED BY 



VOLUME OF WATER FILTERED BY 



VOLUME OF WATER FILTERED BY 



VOLUME OF WATER FILTERED BY 



VOLUME OF WATER FILTERED. 



VOLUME OF WATER FILTERED. 



VOLUME OF WATER FILTERED. 



VOLUME OF WATER FILTERED. + DISCUSSIO 



VOLUME OF WATER FILTERED. + OF SAMPLI 



VOLUME OF WATER FILTERED, AND THE 



VOLUME OF WATER F LTERED, 



VOLUME OF WATER FILTERED, 



VOLUME OF WATER FILTERED, 



VOLUME OF WATER FILTERED, 



VOLUME OF WATER FILTERED, 



VOLUME OF WATER FILTERED, ESCAPEMENT, 



VOLUME OF WATER PASSING THROUGH A 



VOLUME OF WATER STRAINED, CLOGGING, 



VOLUME OF WATER STRAINED, THE VARIAT 



WATER BOTTLE 



WATER BOTTLE, A SIMPLE CONICAL NET 



WATER BUCKET FOR PUNKTON INVESTIGAT 



WATER- MEASURING DEVICE. DESCRIPTION 



WEIGHT OF ZOOPLANKTON COLLECTED BY 



WIRE TENSION, AND ADJUSTMENT OF 



WIRE WHILE TOWING AT A CONSTANT 



WIRE-ANGLE DETERMINATION FOR TOWED N 



WIRE-ANGLE INDICATOR FOR USE WHEN TO 



WOLFENDEN NET. 



YENTSCH SUBMERSIBLE PLANKTON PUMP AND 



YOUNG FISH NET. 



YOUNG FISH NET, 



YOUNG FISH NET, 



YOUNG FISH TRAWL. + 



YOUNG FISH TRAWL. - 



TOWING 

 A CLARKE 

 A NET, 

 A NET, 

 PLANKTON 



+ CA 

 + REDUC 



AND THE 



CATCHING 



CLOGGING, 



ESCAPEMENT 



SAMPLING 



DESCRIPTION OF 

 AND HJORT'S RING 

 THE HELIGOLAND OTTER 

 THE HELGOLAND LAR 

 THE WORK 



YOUNG FISH TRAWL- - 

 YOUNG FISH TRAWL, 

 YOUNG FISH TRAWL, 



SCHERBRUTNETZ . 

 HJORT'S RING NET, 

 WITH A THROTTLING 



281 

 610 

 179 

 109 

 308 

 891 

 501 

 385 

 593 

 013 

 408 

 661 

 675 

 527 

 329 

 635 

 533 

 033 

 791 

 899 

 499 

 703 

 597 

 268 

 383 

 219 

 017 

 308 

 367 

 503 

 145 

 099 

 808 

 033 

 735 

 605 

 915 

 052 

 393 

 395 

 395 

 169 

 325 

 289 

 287 

 565 



I 



82 



