EFFECTS OF PULP MILL POLLUTION ON OYSTERS 
161 
dilutions might well be expected to produce an unfavorable effect after a longer period 
of time. 
(8) From the calculations of McMillin in an accompanying report it is seen that 
the concentration of liquor which would be expected in Oakland Bay is within the 
limits of the concentrations tested in the laboratory. At such concentrations the 
liquor is definitely harmful. 
(9) It is recommended that pulp mills using the sulphite process totally exclude 
waste liquor from waters in which oysters are grown. It is not impossible to dispose 
of waste liquor by means of by-products plants or by evaporating and burning, and 
such measures should be employed in the interest of such natural resources as oysters. 
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