3. Again, if the _Mercury_ ascends to a good height after the fall of rain (as sometimes, but less often it does) then I look for a setled serenity; but if it proceeds after rain in a descending motion, then I expect a continuance of broken and showry weather. But in all, as I only say, _For the most part_, so I dare not positively declare it an affirmative result, but do refer it to the remarks of others. And this may explicate the Notes 6. and 14 of _Num._ 9. into more clearness. 4. That we find the Weather and our Bodies more chill, cold, and drooping, when the _Mercury_ is lowest, and the Air lightest, besides other causes, I guess, That as Air is to us the breath of life, as water is to Fishes; so, when we are deprived of the usual measure of this our food, 'tis the same to us, as when the water is drawn ebb from Fishes. But I would much rather be instructed by others, then offer much in this kind. 5. The lowest descent of the _Mercury_ in all the time, since I have observed it, was _Octob._ 26. 1665. in the Evening, when it was very near at 271/2 Inches. Which I find thus circumstanced with the weather in my notes. _Oct._ 25. Morning; _Mercury_ at 281/2 Inch. Great storms and much rain. _Oct._ 26. Morning; _Merc._ at 28. winds quiet, thick dark clouds. _Oct._ 26. Evening; _Merc._ at 271/2. That day, and some daies following, the weather was variable, frequent rain, and as you see, the _Mercury_ lower, than usual. 6. Over the place, where this _Mercurial Cane_ stands, I have set a _Wind vane_, with purpose of exactness, of a Streamer in Brass so large, and pointing to a Board indented in the Margin, that I can at a sure Level upon the _Vane_, take every of the 32. points of the Wind, half points, and quarter points, at good distance. Otherwise we may find our guesses much deceived, as the best guessers, upon trial, do acknowledge. And this exactness may become the _Wheel-ballance_, which shews the minutest variations almost beyond imagination. And thus any servant, at the approach of a thick Cloud, or other _Meteor_, higher or lower, or at the rising of a storm or fresh wind in the night, or day, may bring a report of the Weight of the Air, as certainly and almost as {166} easily, as of the Sun from the _Dial_ in a Sunshine. It were good to have an _Index_ of Winds, that discover'd as well their Ascent and Descent, as their Side-coastings. * * * * * _A Relation concerning the late _Earthquake_ neer _Oxford_; together with some Observations of the sealed Weatherglass, and the Barometer both upon that _Phaenomenon_, and in _General_._ This Relation was communicated by the excellently learned Dr. _Wallis_, as follows: