I 



BARREN OYSTER BOTTOMS 



SESSIONAL PAPER No. 38a 



Table of Physical Properties — Concluded. 



63 



The table shows the salinities of samples of -water taken in various parts of the 

 bay, from the surface and also from the bottom. No samples -were taken' from inter- 

 mediate depths. The figures sho^w that the densities are "well suited to the life and 

 gro-wth of oysters. 



During the early part of the summer, samples -were obtained from the bottom by 

 means of a narro-w-necked bottle -wrapped with a sufficient quantity of sheet lead to 

 cause it to sink readily. The bottle was lowered by means of a trawl-line which was 

 securely fastened to both cork and neck of the bottle in such a manner that a short 

 loop of line was left between them. The cork was tightly inserted and the bottle 

 lowered by means of the cork to the desired depth and the cork released by sharply 

 jerking the trawl-line. The bottle now filled was raised to the surface. On July 1 

 the brass bottle devised by Dr. H. F. Moore was obtained through the Bureau of 

 Fisheries, Washington, U.S.A., and was used after that date. 



The specific gravities were taken by means of delicate hydrometers graduated 

 from 1-0000 to 1-0100, from 1-0100 to 1-0200 and from 1-0200 to 1-0300. The read- 

 ings obtained were reduced to specific gravities at 60°F. 



Samples of water from various localities were sent to Professor A. B. Macallum's 

 laboratory at the University of Toronto, Dr. Roger Manning very kindly determined 



