[eighteen] Bede then observes that the height of a tides may differ around the month. Raising tides are termed malinae and lowering tides ledones and the thirty day period is split into four elements of seven or 8 times with alternating malinae and ledones.[19] In the same passage he also notes the influence of winds to carry again tides.[19]The UK

The tide heights are anticipated to follow the tidal pressure, with a continuing amplitude and section delay for every component. Mainly because astronomical frequencies and phases could be calculated with certainty, the tide peak at other times can then be predicted as soon as the response into the harmonic parts with the astronomical tide-making