8 GEORGE V SESSIONAL PAPER No. 38a A. 1918 



VII 



FURTHER HYDROGRAPHIC INVESTIGATIONS IN THE BAY OF FUNDY. 



By E. Horne Craigie, B.A., University of Toronto and W. H. Chase^ B.A., Acadia 



University. 



(With 25 figures and 1 map.) 



During the summer of 1914 a hydrographic section of the Bay of Fundy was 

 made, a report of which appeared in the Contributions to Canadian Biology, 1914-1915.1 

 At the beginning of July, 1915, it was suggested that a considerable amount of dredg- 

 ing should be done with a view to working out the fauna of the Bay of Fundy, and the 

 opportunity was taken to combine with this work a repetition of the hydrographic 

 observations made in the previous year and to extend them over the greater part of 

 the Bay. It was thus possible to collect sufficient data to give a general idea of the 

 conditions existing in the water of this important and interesting region. 



observations made and apparatus employed. 



The work was carried out during two cruises in the month of July. The first of 

 these enabled dredging to be carried on at twenty-four stations in St. Mary bay. Nova 

 Scotia, and observations to be taken at stations I to IV in the Bay of Fundy — the 

 stations which were established in 1914. The work of the second cruise comprised 

 dredging at nine stations in the Annapolis basin and the establishment of two more 

 cross-sections and a longitudinal section of the Bay of Fundy. 



In St. Mary bay and the Annapolis basin, the stations in which were numbered 

 consecutively in Arabic numerals, temperatures and water samples were taken at the 

 surface and at the bottom at each dredging station, largely for the sake of the connec- 

 tion of these conditions with the fauna found. At all the Bay of Fundy stations, 

 observations were made at the surface, at depths of 5 and 10 fathoms, and then at 10 

 fathom intervals to the bottom. In the table of data the records for the bottom have 

 been put opposite the nearest depth in tens of fathoms. The exact depth of the obser- 

 vation may be seen at a glance from the record of " Depth " near the top of the 

 column for each station. The hydrographic data obtained in St. Mary bay and the 

 Annapolis basin are tabulated here chiefly in order that they may be accessible when 

 required, though few deducations can be made from them at present. At the Bay of 

 Fundy stations V to XV, dredge hauls were taken; and at these and the Annapolis 

 basin stations, surface plankton samples were also obtained. 



The apparatus employed was the same as that used in 1914, and has been des- 

 cribed in the report of the work done in that year. The temperature of the air and of 

 the surface water were taken by means of a delicate chemical thermometer, all other 

 temperatures were determined by reversing thermometers. The temperatures at 5 and 

 10 fathoms at station III, and from 10 to 40 fathoms at station IV, were determined 

 by a Negretti-Zambra thermometer,^ all other temperatures below the surface by a 

 Eichter thermometer.^ The water samples were obtained by means of a Petterssen- 



1 Craigie, K. Home. "A Hydrographic Section of the Bay of Fundy in 1914." 



2Magnaghi pattern frame, Negretti and Zambra thermometer No. 170664. 



3 Laboratoire Hydrographique, Kobenhavn, Preisliste, 1914, No. 75, thermometer No. 164. 



127 



