Page:Philosophical Transactions - Volume 003.djvu/33

 time of High-water at the New and Full Moon in that place: And you may do it the more readily, it you set down the time of High-water at the New and Full Moon under the Diameter, as I have done for London, where it is high-tide at III. of the clock, So that when the Moon is South at III. of the clock, the perpendicular cuts the diameter at Il. hours 15. m. which added to the time of the Southing makes it V. hours 15. m. and so when the Moon is South at IX. of the clock, by adding 2 h. 15 m. you have the time of high-water, which is XI. of the clock and 15 m.

And thus you may easily make a Table, which by the Southing of the Moon, shall readily tell you the time of High-tide at any time of the Moon, as I have done here for London: To which all other places may be reduced to correspond.

Rh