The Contents.
Patterns of the Tables proposed to be made for Observing of Tides; promised in the next foregoing Transactions. Other Inquiries touching the Sea. Some Considerations touching the Parenchymous parts of the Body. Observables concerning Petrification. A Relation from Paris, of a kind of Worms, that eat out Stones. Some promiscuous Observations made in Somersetshire. A Problem for finding the Year of the Julian Period, by a new and very easie Method. An Account of some Books, not long since publish'd, which are, 1. Tentamina Physico-Theologica de Deo, Authore Samuele Parkero. 2. Honorati Fabri Tractatus duo; Prior, de Plantis et de Generatione Animalium; Posterior, de Homine. 3. Relation du Voyage de l'Evesque de Beryte, par la Turquie, la Perse, les Indes, &c. per Monsieur de Bourges.
Patterns of the Tables proposed to be made for Observing of Tides, promised in the next foregoing Transactions; by Sir Rob. Moray.
In performance of what was promised in the last of these Papers for Observing the Tides, here are subjoyned Patterns of the Tables there mentioned; One, for marking the precise Time of the High waters and Low-waters during one Month; that is, between New and New Moon, or Full and Full Moon. The other, for marking the Degrees of the Risings and Fallings of the Water in Equal spaces of Time, and the Velocity of its motion at several heights: The Degrees of Heat and Cold, &c.
The Times, assigned in the first, to the High waters and Lowest Ebbs, are taken out of Mr. Wing's Almanack, for this present year 1666, as he calculates them for the Month of September for London Bridge. Only, whereas he takes notice but of one High-water for every day, Here are set
down the Times of the other, and the two Ebbs intervening, by subdividing the Differences, he assignes between two Tides, equally amongst them. In all which, though there may be Errors, that is not to be considered, seeing the Dissein is to Correct and State the Times of the Tides exactly by Experiments, after this method. Mr. Wing states the High waters to fall out at London-Bridge constantly, when the Moon is 46. deg. 30. min. to the West-ward of the Meridian. For the Times, he marks for them, are made up by adding every day 3. hours, 6 minutes, to those in his Table for knowing the Time of the Moons coming to the South.
The First Table consists of two Parts, and each part of four Columns. The first part marks the Tides and Ebbs from the day of the New-Moon to its Full: The other, from the Full to the next New. The first Column in both parts hath the day of the Month and Week; M. standing every where for Morning and A. for Afternoon. The third column hath the Character of the day of the Week prefixt to the Hour and Minute of the High-water, and answering to the day of the Month. The last Column hath the same for the time of Low-water, varying the Character of the day, as often as the low-water falls out more early than the High-water. In this Example between the said New Moons there falls out in all just 57. periods of the Tide or Flowing water, and 58. of the Ebb or Low water; which numbers vary according to the Intervals of the Moons changes, but with what constancy and exactness, is to be inquired after: Which whosoever undertakes to do, may keep such a Table, as is here proposed, in a Book by it self.
The other Table doth in 9. Columns comprehend the particular Observations of the Degrees of the Rising and falling of the Tides, and the other things specified at the Tops of them: The first Column marking the Hour and Minut common to all the several Observations. Each hour is divided in 3. equal Parts, that number of Observations being only pitch't upon by way of Example: The numbers may else be varied at pleasure, when other more frequent Observations are thought fit to be made, or when they prove too frequent and laborious; though the most frequent are most desirable, till competent information of all particulars be attained.