Examination is made of the hypothesis that the tide along the eastern coast of the United States results from a co-oscillation of water over the Continental Shelf engendered by motion at the continental slope, the barrier against which the oceanic tidal wave is reflected . Using methods which are effective in analyzing tides in embayments, the range of tide and the time of high water over the continental slope have been estimated from data on the tide at the coast and from the topography of the off-lying shelf....