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Marmora. It would be more to the point to consider what would occur if there were no river inflow into Goose Bay at the head of Lake Melville. which conies from a drainage area of nearly 52,000 square miles. It is evident that if there were no inflow of fresh water there would be nothing to keep the lake surface at a higher level than the ocean outside. The tidal streams would become equal out and in through The Narrows, and the water throughout would become as salt as the ocean. The rise of the tide would become greater, for there would be no water slope against its entering, nor would there be a preponderance of outflowing water for the tide to overcome. Lake Melville would thus pass into the other class and become a true inlet of the sea, but with a decreased area.

Summary.—The conditions in Lake Melville and the Narrows that connect it with the ocean may be summarized as follows : The rivers that flow into Lake Melville dilute the sea water to such an extent that sea fish do not enter the lake ; the volume of the inflowing rivers is so great that it maintains the level of the lake above sea level, and modifies the ordinary tidal action of the sea ; this higher level together with the large river volume causes the outflowing ebb in The Narrows to be stronger than the flood ; and the point where the tide attains its maximum range is outside the Narrows, which shows that the river system extends as far as this point. The features are all those of a tidal river, as distinguished from an inlet or arm of the sea ; and accordingly the Lake Melville area may properly be considered part of the Hamilton river system with the mouth of the river at the outer end of the Narrows.

W. BELL DAWSON,

Former Superintendent, Tidal and Current Survey of Canada ; President of Section of Oceanography, for Canada, in the International Union of Geodesy and Geophysics.
18th July, 1926.

[1927lab]



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