Keywords: MARTIN KARLSEN plankton.jpg THE MARTIN KARLSEN A CANADIAN SHIP IS A FLOATING LABORATORY FROM WHICH SCIENTISTS ARE ANALYZING PHYSICAL CHEMICAL BIOLOGICAL AND METEOROLOGICAL CONDITIONS IN LAKE SUPERIOR SUCH COMPLETE STUDY OF FRESH WATER IS CALLED LIMNOLOGY LIMNOLOGIST DRAINS CONTENTS OF PLANKTON NET INTO LABORATORY BOTTLE THE_ MARTIN_KARLSEN _A_CANADIAN_SHIP _IS_A_FLOATING_LABORATORY_FROM_WHICH_SCIENTISTS_ARE_ANALYZING_PHYSICAL _-_NARA_-_549616 jpg 2011-12-25 11 38 UTC Donald Emmerich Photographer derivative work Citron <span class signature-talk >talk</span> User Citron THE_ MARTIN_KARLSEN _A_CANADIAN_SHIP _IS_A_FLOATING_LABORATORY_FROM_WHICH_SCIENTISTS_ARE_ANALYZING_PHYSICAL _-_NARA_-_549616 jpg PD-USGov Original upload log This image is a derivative work of the following images File THE_ MARTIN_KARLSEN _A_CANADIAN_SHIP _IS_A_FLOATING_LABORATORY_FROM_WHICH_SCIENTISTS_ARE_ANALYZING_PHYSICAL _-_NARA_-_549616 jpg licensed with PD-USGov 2011-10-24T04 42 42Z US National Archives bot 2044x3000 994991 Bytes <nowiki> NARA-image-full THE MARTIN KARLSEN A CANADIAN SHIP IS A FLOATING LABORATORY FROM WHICH SCIENTISTS ARE ANALYZING PHYSICAL CHEMICAL BIOLOGICAL AND METEOROLOGICAL CONDI</nowiki> Uploaded with derivativeFX Martin Karlsen ship 1952 Plankton Bongo nets |